zFD5_04
extensor \n. A muscle that causes extension
extenuate \v. To diminish the gravity or importance of
exterior \n. That which is outside
external \n. Anything relating or belonging to the outside
extinct \adj. Being no longer in existence
extinguish \v. To render extinct
extol \v. To praise in the highest terms
extort \v. To obtain by violence, threats, compulsion, or the subjection of another to some necessity
extortion \n. The practice of obtaining by violence or compulsion
extradite \v. To surrender the custody of
extradition \n. The surrender by a government of a person accused of crime to the justice of another government
extrajudicial \adj. Happening out of court
extraneous \adj. Having no essential relation to a subject
extraordinary \adj. Unusual
extravagance \n. Undue expenditure of money
extravagant \adj. Needlessly free or lavish in expenditure
extremist \n. One who supports extreme measures or holds extreme views
extremity \n. The utmost point, side, or border, or that farthest removed from a mean position
extricate \v. Disentangle
extrude \v. To drive out or away
exuberance \n. Rich supply
exuberant \adj. Marked by great plentifulness
fabricate \v. To invent fancifully or falsely
fabulous \adj. Incredible
facet \n. One of the small triangular plane surfaces of a diamond or other gem
facetious \adj. Amusing
facial \adj. Pertaining to the face
facile \adj. Not difficult to do
facilitate \v. To make more easy
facility \n. Ease
facsimile \n. An exact copy or reproduction
faction \n. A number of persons combined for a common purpose
factious \adj. Turbulent
fallacious \adj. Illogical
fallacy \n. Any unsound or delusive mode of reasoning, or anything based on such reasoning
fallible \adj. Capable of erring
fallow \n. Land broken up and left to become mellow or to rest
famish \v. To suffer extremity of hunger or thirst
fanatic \n. A religious zealot
fancier \n. One having a taste for or interest in special objects
fanciless \adj. Unimaginative
fastidious \adj. Hard to please
fathom \n. A measure of length, 6 feet
fatuous \adj. Idiotic 
faulty \adj. Imperfect
faun \n. One of a class of deities of the woods and herds represented as half human, with goats feet
fawn \n. A young deer
fealty \n. Loyalty
feasible \adj. That may be done, performed, or effected; practicable
federate \v. To league together
feint \n. Any sham, pretense, or deceptive movement
felicitate \v. To wish joy or happiness to, especially in view of a coming event
felicity \n. A state of well-founded happiness
felon \n. A criminal or depraved person
felonious \adj. Showing criminal or evil purpose
felony \n. One of the highest class of offenses, and punishable with death or imprisonment
feminine \adj. Characteristic of woman or womankind
fernery \n. A place in which ferns are grown
ferocious \adj. Of a wild, fierce, and savage nature
ferocity \n. Savageness
fervent \adj. Ardent in feeling
fervid \adj. Intense
fervor \n. Ardor or intensity of feeling
festal \adj. Joyous
festive \adj. Merry
fete \n. A festival or feast
fetus \n. The young in the womb or in the egg
feudal \adj. Pertaining to the relation of lord and vassal
feudalism \n. The feudal system
fez \n. A brimless felt cap in the shape of a truncated cone, usually red with a black tassel
fiasco \n. A complete or humiliating failure
fickle \adj. Unduly changeable in feeling, judgment, or purpose
fictitious \adj. Created or formed by the imagination
fidelity \n. Loyalty
fiducial \adj. Indicative of faith or trust
fief \n. A landed estate held under feudal tenure
filibuster \n. One who attempts to obstruct legislation
finale \n. Concluding performance
finality \n. The state or quality of being final or complete
finally \adv. At last
financial \adj. Monetary
financier \n. One skilled in or occupied with financial affairs or operations
finery \n. That which is used to decorate the person or dress
finesse \n. Subtle contrivance used to gain a point
finite \adj. Limited
fiscal \adj. Pertaining to the treasury or public finances of a government
fishmonger \n. One who sells fish
fissure \n. A crack or crack-like depression
fitful \adj. Spasmodic
fixture \n. One who or that which is expected to remain permanently in its position
flag-officer \n. The captain of a flag-ship
flagrant \adj. Openly scandalous
flamboyant \adj. Characterized by extravagance and in general by want of good taste
flatulence \n. Accumulation of gas in the stomach and bowels
flection \n. The act of bending
fledgling \n. A young bird
flexible \adj. Pliable
flimsy \adj. Thin and weak
flippant \adj. Having a light, pert, trifling disposition
floe \n. A collection of tabular masses of floating polar ice
flora \n. The aggregate of plants growing without cultivation in a district
floral \adj. Pertaining to flowers
florid \adj. Flushed with red
florist \n. A dealer in flowers
fluctuate \v. To pass backward and forward irregularly from one state or degree to another
fluctuation \n. Frequent irregular change back and forth from one state or degree to another
flue \n. A smoke-duct in a chimney
fluent \adj. Having a ready or easy flow of words or ideas
fluential \adj. Pertaining to streams
flux \n. A state of constant movement, change, or renewal
foggy \adj. Obscure
foible \n. A personal weakness or failing
foist \v. To palm off
foliage \n. Any growth of leaves
folio \n. A sheet of paper folded once, or of a size adapted to folding once
folk-lore \n. The traditions, beliefs, and customs of the common people
fondle \v. To handle tenderly and lovingly
foolery \n. Folly
foot-note \n. A note of explanation or comment at the foot of a page or column
foppery \n. Dandyism
foppish \adj. Characteristic of one who is unduly devoted to dress and the niceties of manners
forbearance \n. Patient endurance or toleration of offenses
forby \adv. Besides
forcible \adj. Violent
forecourt \n. A court opening directly from the street
forejudge \v. To judge of before hearing evidence
forepeak \n. The extreme forward part of a ship's hold, under the lowest deck
foreshore \n. That part of a shore uncovered at low tide
forebode \v. To be an omen or warning sign of, especially of evil
forecast \v. To predict
forecastle \n. That part of the upper deck of a ship forward of the after fore-shrouds
foreclose \v. To bar by judicial proceedings the equitable right of a mortgagor to redeem property
forefather \n. An ancestor
forego \v. To deny oneself the pleasure or profit of
foreground \n. That part of a landscape or picture situated or represented as nearest the spectator
forehead \n. The upper part of the face, between the eyes and the hair
foreign \adj. Belonging to, situated in, or derived from another country
foreigner \n. A citizen of a foreign country
foreknowledge \n. Prescience
foreman \n. The head man
foreordain \v. To predetermine
foreordination \n. Predestination
forerun \v. To go before as introducing or ushering in
foresail \n. A square sail
foresee \v. To discern beforehand
foresight \n. Provision against harm or need
foretell \v. To predict
forethought \n. Premeditation
forfeit \v. To lose possession of through failure to fulfill some obligation
forfend \v. To ward off
forgery \n. Counterfeiting
forgo \v. To deny oneself
formation \n. Relative disposition of parts
formidable \adj. Difficult to accomplish
formula \n. Fixed rule or set form
forswear \v. To renounce upon oath
forte \n. A strong point
forth \adv. Into notice or view
forthright \adv. With directness
fortify \v. To provide with defensive works
fortitude \n. Patient courage
foursome \adj. Consisting of four
fracture \n. A break
fragile \adj. Easily broken
frailty \n. Liability to be broken or destroyed
fragile \adj. Capable of being broken
frankincense \n. A gum or resin which on burning yields aromatic fumes
frantic \adj. Frenzied
fraternal \adj. Brotherly
fraudulence \n. Deceitfulness
fraudulent \adj. Counterfeit
fray \v. To fret at the edge so as to loosen or break the threads
freemason \n. A member of an ancient secret fraternity originally confined to skilled artisans
freethinker \n. One who rejects authority or inspiration in religion
free trade \n. Commerce unrestricted by tariff or customs
frequency \n. The comparative number of any kind of occurrences within a given time or space
fresco \n. The art of painting on a surface of plaster, particularly on walls and ceilings
freshness \n. The state, quality, or degree of being fresh
fretful \adj. Disposed to peevishness
frightful \adj. Apt to induce terror or alarm
frigid \adj. Lacking warmth
frigidarium \n. A room kept at a low temperature for preserving fruits, meat, etc
frivolity \n. A trifling act, thought, saying, or practice
frivolous \adj. Trivial
frizz \v. To give a crinkled, fluffy appearance to
frizzle \v. To cause to crinkle or curl, as the hair
frolicsome \adj. Prankish
frontier \n. The part of a nation's territory that abuts upon another country
frowzy \adj. Slovenly in appearance
frugal \adj. Economical
fruition \n. Fulfillment
fugacious \adj. Fleeting
fulcrum \n. The support on or against which a lever rests, or the point about which it turns
fulminate \v. To cause to explode
fulsome \adj. Offensive from excess of praise or commendation
fumigate \v. To subject to the action of smoke or fumes, especially for disinfection
functionary \n. An official
fundamental \adj. Basal
fungible \adj. That may be measured, counted, or weighed
fungous \adj. Spongy
fungus \n. A plant destitute of chlorophyll, as a mushroom
furbish \v. To restore brightness or beauty to
furlong \n. A measure, one-eighth of a mile
furlough \n. A temporary absence of a soldier or sailor by permission of the commanding officer
furrier \n. A dealer in or maker of fur goods
further \adj. More distant or advanced
furtherance \n. Advancement
furtive \adj. Stealthy or sly, like the actions of a thief
fuse \v. To unite or blend as by melting together
fusible \adj. Capable of being melted by heat
futile \adj. Of no avail or effect
futurist \n. A person of expectant temperament
gauge \n. An instrument for measuring
gaiety \n. Festivity
gaily \adv. Merrily
gait \n. Carriage of the body in going
gallant \adj. Possessing a brave or chivalrous spirit
galore \adj. Abundant
galvanic \adj. Pertaining or relating to electricity produced by chemical action
galvanism \n. Current electricity, especially that arising from chemical action
galvanize \v. To imbue with life or animation
gamble \v. To risk money or other possession on an event, chance, or contingency
gambol \n. Playful leaping or frisking
gamester \n. A gambler
gamut \n. The whole range or sequence
garnish \v. In cookery, to surround with additions for embellishment
garrison \n. The military force stationed in a fort, town, or other place for its defense
garrote \v. To execute by strangling
garrulous \adj. Given to constant trivial talking
gaseous \adj. Light and unsubstantial
gastric \adj. Of, pertaining to, or near the stomach
gastritis \n. Inflammation of the stomach
gastronomy \n. The art of preparing and serving appetizing food
gendarme \n. In continental Europe, particularly in France, a uniformed and armed police officer
genealogy \n. A list, in the order of succession, of ancestors and their descendants
genealogist \n. A tracer of pedigrees
generality \n. The principal portion
generalize \v. To draw general inferences
generally \adv. Ordinarily
generate \v. To produce or cause to be
generic \adj. Noting a genus or kind; opposed to specific
generosity \n. A disposition to give liberally or to bestow favors heartily
genesis \n. Creation
geniality \n. Warmth and kindliness of disposition
genital \adj. Of or pertaining to the animal reproductive organs
genitive \adj. Indicating source, origin, possession, or the like
genteel \adj. Well-bred or refined
gentile \adj. Belonging to a people not Jewish
geology \n. The department of natural science that treats of the constitution and structure of the earth
germane \adj. Relevant
germinate \v. To begin to develop into an embryo or higher form
gestation \n. Pregnancy
gesticulate \v. To make gestures or motions, as in speaking, or in place of speech
gesture \n. A movement or action of the hands or face, expressive of some idea or emotion
ghastly \adj. Hideous
gibe \v. To utter taunts or reproaches
giddy \adj. Affected with a whirling or swimming sensation in the head. 
gigantic \adj. Tremendous
giver \n. One who gives, in any sense
glacial \adj. Icy, or icily cold
glacier \n. A field or stream of ice
gladden \v. To make joyous
glazier \n. One who cuts and fits panes of glass, as for windows
glimmer \n. A faint, wavering, unsteady light
glimpse \n. A momentary look
globose \adj. Spherical
globular \adj. Spherical
glorious \adj. Of excellence and splendor
glutinous \adj. Sticky
gluttonous \adj. Given to excess in eating
gnash \v. To grind or strike the teeth together, as from rage
Gordian knot \n. Any difficulty the only issue out of which is by bold or unusual manners
gourmand \n. A connoisseur in the delicacies of the table
gosling \n. A young goose
gossamer \adj. Flimsy
gourd \n. A melon, pumpkin, squash, or some similar fruit having a hard rind
graceless \adj. Ungracious
gradation \n. A step, degree, rank, or relative position in an order or series
gradient \adj. Moving or advancing by steps
granary \n. A storehouse for grain after it is thrashed or husked
grandeur \n. The quality of being grand or admirably great
grandiloquent \adj. Speaking in or characterized by a pompous or bombastic style
grandiose \adj. Having an imposing style or effect
grantee \n. The person to whom property is transferred by deed
grantor \n. The maker of a deed
granular \adj. Composed of small grains or particles
granulate \v. To form into grains or small particles
granule \n. A small grain or particle
grapple \v. To take hold of
gratification \n. Satisfaction
gratify \v. To please, as by satisfying a physical or mental desire or need
gratuitous \adj. Voluntarily
gratuity \n. That which is given without demand or claim. Tip
gravity \n. Seriousness
gregarious \adj. Not habitually solitary or living alone
grenadier \n. A member of a regiment composed of men of great stature
grief \n. Sorrow
grievance \n. That which oppresses, injures, or causes grief and at the same time a sense of wrong
grievous \adj. Creating affliction
grimace \n. A distortion of the features, occasioned by some feeling of pain, disgust, etc
grindstone \n. A flat circular stone, used for sharpening tools
grisly \adj. Fear-inspiring
grotesque \adj. Incongruously composed or ill-proportioned
grotto \n. A small cavern
ground \n. A pavement or floor or any supporting surface on which one may walk
guess \n. Surmise
guile \n. Duplicity
guileless \adj. Frank
guinea \n. An English monetary unit
guise \n. The external appearance as produced by garb or costume
gullible \adj. Credulous
gumption \n. Common sense
gusto \n. Keen enjoyment
guy \n. Stay-rope
guzzle \v. To swallow greedily or hastily; gulp
gynecocracy \n. Female supremacy
gynecology \n. The science that treats of the functions and diseases peculiar to women
gyrate \v. To revolve
gyroscope \n. An instrument for illustrating the laws of rotation
habitable \adj. Fit to be dwelt in
habitant \n. Dweller
habitual \adj. According to usual practice
habitude \n. Customary relation or association
hackney \v. To make stale or trite by repetition
haggard \adj. Worn and gaunt in appearance
halcyon \adj. Calm
hale \adj. Of sound and vigorous health
handwriting \n. Penmanship
hanger-on \n. A parasite
happy-go-lucky \adj. Improvident
harangue \n. A tirade
harass \v. To trouble with importunities, cares, or annoyances
harbinger \n. One who or that which foreruns and announces the coming of any person or thing
hard-hearted \adj. Lacking pity or sympathy
hardihood \n. Foolish daring
harmonious \adj. Concordant in sound
havoc \n. Devastation
hawthorn \n. A thorny shrub much used in England for hedges
hazard \n. Risk
head first \adv. Precipitately, as in diving
head foremost \adv. Precipitately, as in diving
heartrending \adj. Very depressing
heathenish \adj. Irreligious
heedless \adj. Thoughtless
heifer \n. A young cow
heinous \adj. Odiously sinful
hemorrhage \n. Discharge of blood from a ruptured or wounded blood-vessel
hemorrhoids \n. pl. Tumors composed of enlarged and thickened blood-vessels, at the lower end of the rectum
henchman \n. A servile assistant and subordinate
henpeck \v. To worry or harass by ill temper and petty annoyances
heptagon \n. A figure having seven sides and seven angles
heptarchy \n. A group of seven governments
herbaceous \adj. Having the character of a herb
herbarium \n. A collection of dried plants scientifically arranged for study
herbivorous \adj. Feeding on herbs or other vegetable matter, as animals
hereditary \adj. Passing naturally from parent to child
heredity \n. Transmission of physical or mental qualities, diseases, etc., from parent to offspring
heresy \n. An opinion or doctrine subversive of settled beliefs or accepted principles
heretic \n. One who holds opinions contrary to the recognized standards or tenets of any philosophy
heritage \n. Birthright
hernia \n. Protrusion of any internal organ in whole or in part from its normal position
hesitancy \n. A pausing to consider
hesitant \adj. Vacillating
hesitation \n. Vacillation
heterodox \adj. At variance with any commonly accepted doctrine or opinion
heterogeneity \n. Unlikeness of constituent parts
heterogeneous \adj. Consisting of dissimilar elements or ingredients of different kinds
heteromorphic \adj. Deviating from the normal form or standard type
hexangular \adj. Having six angles
hexapod \adj. Having six feet
hexagon \n. A figure with six angles
hiatus \n. A break or vacancy where something necessary to supply the connection is wanting
hibernal \adj. Pertaining to winter
Hibernian \adj. Pertaining to Ireland, or its people
hideous \adj. Appalling
hilarious \adj. Boisterously merry
hillock \n. A small hill or mound
hinder \v. To obstruct
hindmost \adj. Farthest from the front
hindrance \n. An obstacle
hirsute \adj. Having a hairy covering
hoard \v. To gather and store away for the sake of accumulation
hoarse \adj. Having the voice harsh or rough, as from a cold or fatigue
homage \n. Reverential regard or worship
homogeneity \n. Congruity of the members or elements or parts
homogeneous \adj. Made up of similar parts or elements
homologous \adj. Identical in nature, make-up, or relation
homonym \n. A word agreeing in sound with but different in meaning from another
homophone \n. A word agreeing in sound with but different in meaning from another
honorarium \n. A token fee or payment to a professional man for services
hoodwink \v. To deceive
horde \n. A gathered multitude of human beings
hosiery \n. A stocking
hospitable \adj. Disposed to treat strangers or guests with generous kindness
hospitality \n. The practice of receiving and entertaining strangers and guests with kindness
hostility \n. Enmity
huckster \n. One who retails small wares
humane \adj. Compassionate
humanitarian \n. A philanthropist
humanize \v. To make gentle or refined
humbug \n. Anything intended or calculated to deceive or mislead
humiliate \v. To put to shame
hussar \n. A light-horse trooper armed with saber and carbine
hustle \v. To move with haste and promptness
hybrid \adj. Cross-bred
hydra \n. The seven- or nine-headed water-serpent slain by Hercules
hydraulic \adj. Involving the moving of water, of the force exerted by water in motion
hydrodynamics \n. The branch of mechanics that treats of the dynamics of fluids
hydroelectric \adj. Pertaining to electricity developed water or steam
hydromechanics \n. The mechanics of fluids
hydrometer \n. An instrument for determining the density of solids and liquids by flotation
hydrostatics \n. The branch of science that treats of the pressure and equilibrium of fluids
hydrous \adj. Watery
hygiene \n. The branch of medical science that relates to improving health
hypercritical \adj. Faultfinding
hypnosis \n. An artificial trance-sleep
hypnotic \adj. Tending to produce sleep
hypnotism \n. An artificially induced somnambulistic state in which the mind readily acts on suggestion
hypnotize \v. To produce a somnambulistic state in which the mind readily acts on suggestions
hypocrisy \n. Extreme insincerity
hypocrite \n. One who makes false professions of his views or beliefs
hypodermic \adj. Pertaining to the area under the skin
hypotenuse \n. The side of a right-angled triangle opposite the right angle
hypothesis \n. A proposition taken for granted as a premise from which to reach a conclusion
hysteria \n. A nervous affection occurring typically in paroxysms of laughing and crying
ichthyic \adj. Fish-like
ichthyology \n. The branch of zoology that treats of fishes
ichthyosaurs \n. A fossil reptile
icily \adv. Frigidly
iciness \n. The state of being icy
icon \n. An image or likeness
iconoclast \n. An image-breaker
idealize \v. To make to conform to some mental or imaginary standard
idiom \n. A use of words peculiar to a particular language
idiosyncrasy \n. A mental quality or habit peculiar to an individual
idolize \v. To regard with inordinate love or admiration
ignoble \adj. Low in character or purpose
ignominious \adj. Shameful
Iliad \n. A Greek epic poem describing scenes from the siege of Troy
illegal \adj. Not according to law
illegible \adj. Undecipherable
illegitimate \adj. Unlawfully begotten
illiberal \adj. Stingy
illicit \adj. Unlawful
illimitable \adj. Boundless
illiterate \adj. Having little or no book-learning
ill-natured \adj. Surly
illogical \adj. Contrary to the rules of sound thought
illuminant \n. That which may be used to produce light
illuminate \v. To supply with light
illumine \v. To make bright or clear
illusion \n. An unreal image presented to the senses
illusive \adj. Deceptive
illusory \adj. Deceiving or tending to deceive, as by false appearance
imaginable \adj. That can be imagined or conceived in the mind
imaginary \adj. Fancied
imbibe \v. To drink or take in
imbroglio \n. A misunderstanding attended by ill feeling, perplexity, or strife
imbrue \v. To wet or moisten
imitation \n. That which is made as a likeness or copy
imitator \n. One who makes in imitation
immaculate \adj. Without spot or blemish
immaterial \adj. Of no essential consequence
immature \adj. Not full-grown
immeasurable \adj. Indefinitely extensive
immense \adj. Very great in degree, extent, size, or quantity
immerse \v. To plunge or dip entirely under water or other fluid
immersion \n. The act of plunging or dipping entirely under water or another fluid
immigrant \n. A foreigner who enters a country to settle there
immigrate \v. To come into a country or region from a former habitat
imminence \n. Impending evil or danger
imminent \adj. Dangerous and close at hand
immiscible \adj. Separating, as oil and water
immoral \adj. Habitually engaged in licentious or lewd practices
immortalize \v. To cause to last or to be known or remembered throughout a great or indefinite length of time
immovable \adj. Steadfast
immune \adj. Exempt, as from disease
immutable \adj. Unchangeable
impair \v. To cause to become less or worse
impalpable \adj. Imperceptible to the touch
impartial \adj. Unbiased
impassable \adj. That can not be passed through or over
impassible \adj. Not moved or affected by feeling
impassive \adj. Unmoved by or not exhibiting feeling
impatience \n. Unwillingness to brook delays or wait the natural course of things
impeccable \adj. Blameless
impecunious \adj. Having no money
impede \v. To be an obstacle or to place obstacles in the way of
impel \v. To drive or urge forward
impend \v. To be imminent
imperative \adj. Obligatory
imperceptible \adj. Indiscernible
imperfectible \adj. That can not be perfected
imperil \v. To endanger
imperious \adj. Insisting on obedience
impermissible \adj. Not permissible
impersonal \adj. Not relating to a particular person or thing
impersonate \v. To appear or act in the character of
impersuadable \adj. Unyielding
impertinence \n. Rudeness
imperturbable \adj. Calm
impervious \adj. Impenetrable
impetuosity \n. Rashness
impetuous \adj. Impulsive
impetus \n. Any impulse or incentive
impiety \n. Irreverence toward God
impious \adj. Characterized by irreverence or irreligion
implausible \adj. Not plausible
impliable \adj. Capable of being inferred
implicate \v. To show or prove to be involved in or concerned 
implicit \adj. Implied
imply \v. To signify
impolitic \adj. Inexpedient
importation \n. The act or practice of bringing from one country into another
importunate \adj. Urgent in character, request, or demand
importune \v. To harass with persistent demands or entreaties
impotent \adj. Destitute of or lacking in power, physical, moral, or intellectual
impoverish \v. To make indigent or poor
impracticable \adj. Not feasible
impregnable \adj. That can not be taken by assault
impregnate \v. To make pregnant
impromptu \n. Anything done or said on the impulse of the moment
improper \adj. Not appropriate, suitable, or becoming
impropriety \n. The state or quality of being unfit, unseemly, or inappropriate
improvident \adj. Lacking foresight or thrift
improvise \v. To do anything extemporaneously or offhand
imprudent \adj. Heedless
impudence \n. Insolent disrespect
impugn \v. To assail with arguments, insinuations, or accusations
impulsion \n. Impetus
impulsive \adj. Unpremeditated
impunity \n. Freedom from punishment
impure \adj. Tainted
impute \v. To attribute
inaccessible \adj. Difficult of approach
inaccurate \adj. Not exactly according to the facts
inactive \adj. Inert
inadequate \adj. Insufficient
inadmissible \adj. Not to be approved, considered, or allowed, as testimony
inadvertent \adj. Accidental
inadvisable \adj. Unadvisable
inane \adj. Silly
inanimate \adj. Destitute of animal life
inapprehensible \adj. Not to be understood
inapt \adj. Awkward or slow
inarticulate \adj. Speechless
inaudible \adj. That can not be heard
inborn \adj. Implanted by nature
inbred \adj. Innate
incandescence \n. The state of being white or glowing with heat
incandescent \adj. White or glowing with heat
incapacitate \v. To deprive of power, capacity, competency, or qualification
incapacity \n. Want of power to apprehend, understand, and manage
incarcerate \v. To imprison
incendiary \n. Chemical or person who starts a fire-literally or figuratively
incentive \n. That which moves the mind or inflames the passions
inception \n. The beginning
inceptive \adj. Beginning
incessant \adj. Unceasing
inchmeal \adv. Piecemeal
inchoate \adj. Incipient
inchoative \n. That which begins, or expresses beginning
incidence \n. Casual occurrence
incident \n. A happening in general, especially one of little importance
incidentally \adv. Without intention
incinerate \v. To reduce to ashes
incipience \n. Beginning
incipient \adj. Initial
incisor \n. A front or cutting tooth
incite \v. To rouse to a particular action
incitement \n. That which moves to action, or serves as an incentive or stimulus
incoercible \adj. Incapable of being forced, constrained, or compelled
incoherence \n. Want of connection, or agreement, as of parts or ideas in thought, speech, etc
incoherent \adj. Not logically coordinated, as to parts, elements, or details
incombustible \adj. That can not be burned
incomparable \adj. Matchless
incompatible \adj. Discordant
incompetence \n. General lack of capacity or fitness
incompetent \adj. Not having the abilities desired or necessary for any purpose
incomplete \adj. Lacking some element, part, or adjunct necessary or required
incomprehensible \adj. Not understandable
incompressible \adj. Resisting all attempts to reduce volume by pressure
inconceivable \adj. Incomprehensible
incongruous \adj. Unsuitable for the time, place, or occasion
inconsequential \adj. Valueless
inconsiderable \adj. Small in quantity or importance
inconsistent \adj. Contradictory
inconstant \adj. Changeable
incontrovertible \adj. Indisputable
inconvenient \adj. Interfering with comfort or progress
indefensible \adj. Untenable
indefinitely \adv. In a vague or uncertain way
indelible \adj. That can not be blotted out, effaced, destroyed, or removed
indescribable \adj. That can not be described
indestructible \adj. That can not be destroyed
indicant \adj. That which points out
indicator \n. One who or that which points out
indict \v. To find and declare chargeable with crime
indigence \n. Poverty
indigenous \adj. Native
indigent \adj. Poor
indigestible \adj. Not digestible, or difficult to digest
indigestion \n. Difficulty or failure in the alimentary canal in changing food into absorptive nutriment
indignant \adj. Having such anger and scorn as is aroused by meanness or wickedness
indignity \n. Unmerited contemptuous conduct or treatment
indiscernible \adj. Not perceptible
indiscreet \adj. Lacking wise judgment
indiscriminate \adj. Promiscuous
indispensable \adj. Necessary or requisite for the purpose
indistinct \adj. Vague
indivertible \adj. That can not be turned aside
indivisible \adj. Not separable into parts
indolence \n. Laziness
indolent \adj. Habitually inactive or idle
indomitable \adj. Unconquerable
induct \v. To bring in
indulgence \n. The yielding to inclination, passion, desire, or propensity in oneself or another
indulgent \adj. Yielding to the desires or humor of oneself or those under one's care
inebriate \v. To intoxicate
inedible \adj. Not good for food
ineffable \adj. Unutterable
inefficient \adj. Not accomplishing an intended purpose
inefficiency \n. That which does not accomplish an intended purpose
ineligible \adj. Not suitable to be selected or chosen
inept \adj. Not fit or suitable
inert \adj. Inanimate
inestimable \adj. Above price
inevitable \adj. Unavoidable
inexcusable \adj. Not to be justified
inexhaustible \adj. So large or furnishing so great a supply as not to be emptied, wasted, or spent
inexorable \adj. Unrelenting
inexpedient \adj. Unadvisable
inexpensive \adj. Low-priced
inexperience \n. Lack of or deficiency in experience
inexplicable \adj. Such as can not be made plain
inexpressible \adj. Unutterable
inextensible \adj. Of unchangeable length or area
infallible \adj. Exempt from error of judgment, as in opinion or statement
infamous \adj. Publicly branded or notorious, as for vice, or crime
infamy \n. Total loss or destitution of honor or reputation
inference \n. The derivation of a judgment from any given material of knowledge on the ground of law
infernal \adj. Akin to or befitting hell or its occupants. 
infest \v. To be present in such numbers as to be a source of annoyance, trouble, or danger
infidel \n. One who denies the existence of God
infidelity \n. Disloyalty
infinite \adj. Measureless
infinity \n. Boundless or immeasurable extension or duration
infirm \adj. Lacking in bodily or mental strength
infirmary \n. A place for the reception or treatment of the sick
infirmity \n. A physical, mental, or moral weakness or flaw
inflammable \adj. Easily set on fire or excited
inflammation \n. A morbid process in some part of the body characterized by heat, swelling, and pain
inflexible \adj. That can not be altered or varied
influence \n. Ability to sway the will of another
influential \adj. Having the power to sway the will of another. 
influx \n. Infusion