hydraulic
hydraulic (adj)
Involving the moving of water, of the force exerted by water in motion.
hydrodynamics
hydrodynamics (n)
The branch of mechanics that treats of the dynamics of fluids.
hydroelectric
hydroelectric (adj)
Pertaining to electricity developed water or steam.
hydromechanics
hydromechanics (n)
The mechanics of fluids.
hydrometer
hydrometer (n)
An instrument for determining the density of solids and liquids by flotation.
hydrostatics
hydrostatics (n)
The branch of science that treats of the pressure and equilibrium of fluids.
hydrous
hydrous (adj)
Watery.
hygiene
hygiene (n)
The branch of medical science that relates to improving health.
hypercritical
hypercritical (adj)
Faultfinding.
hypnosis
hypnosis (n)
An artificial trance-sleep.
hypnotic
hypnotic (adj)
Tending to produce sleep.
hypnotism
hypnotism (n)
An artificially induced somnambulistic state in which the mind readily acts on suggestion.
hypnotize
hypnotize (v)
To produce a somnambulistic state in which the mind readily acts on suggestions.
hypocrisy
hypocrisy (n)
Extreme insincerity.
hypocrite
hypocrite (n)
One who makes false professions of his views or beliefs.
hypodermic
hypodermic (adj)
Pertaining to the area under the skin.
hypotenuse
hypotenuse (n)
The side of a right-angled triangle opposite the right angle.
hypothesis
hypothesis (n)
A proposition taken for granted as a premise from which to reach a conclusion.
hysteria
hysteria (n)
A nervous affection occurring typically in paroxysms of laughing and crying.
ichthyic
ichthyic (adj)
Fish-like.
ichthyology
ichthyology (n)
The branch of zoology that treats of fishes.
ichthyosaurs
ichthyosaurs (n)
A fossil reptile.
icily
icily (adv)
Frigidly.
iciness
iciness (n)
The state of being icy.
icon
icon (n)
An image or likeness.
iconoclast
iconoclast (n)
An image-breaker.
idealize
idealize (v)
To make to conform to some mental or imaginary standard.
idiom
idiom (n)
A use of words peculiar to a particular language.
idiosyncrasy
idiosyncrasy (n)
A mental quality or habit peculiar to an individual.
idolize
idolize (v)
To regard with inordinate love or admiration.
ignoble
ignoble (adj)
Low in character or purpose.
ignominious
ignominious (adj)
Shameful.
Iliad
Iliad (n)
A Greek epic poem describing scenes from the siege of Troy.
illegal
illegal (adj)
Not according to law.
illegible
illegible (adj)
Undecipherable.
illegitimate
illegitimate (adj)
Unlawfully begotten.
illiberal
illiberal (adj)
Stingy.
illicit
illicit (adj)
Unlawful.
illimitable
illimitable (adj)
Boundless.
illiterate
illiterate (adj)
Having little or no book-learning.
ill-natured
ill-natured (adj)
Surly.
illogical
illogical (adj)
Contrary to the rules of sound thought.
illuminant
illuminant (n)
That which may be used to produce light.
illuminate
illuminate (v)
To supply with light.
illumine
illumine (v)
To make bright or clear.
illusion
illusion (n)
An unreal image presented to the senses.
illusive
illusive (adj)
Deceptive.
illusory
illusory (adj)
Deceiving or tending to deceive, as by false appearance.
imaginable
imaginable (adj)
That can be imagined or conceived in the mind.
imaginary
imaginary (adj)
Fancied.
imbibe
imbibe (v)
To drink or take in.
imbroglio
imbroglio (n)
A misunderstanding attended by ill feeling, perplexity, or strife.
imbrue
imbrue (v)
To wet or moisten.
imitation
imitation (n)
That which is made as a likeness or copy.
imitator
imitator (n)
One who makes in imitation.
immaculate
immaculate (adj)
Without spot or blemish.
immaterial
immaterial (adj)
Of no essential consequence.
immature
immature (adj)
Not full-grown.
immeasurable
immeasurable (adj)
Indefinitely extensive.
immense
immense (adj)
Very great in degree, extent, size, or quantity.
immerse
immerse (v)
To plunge or dip entirely under water or other fluid.
immersion
immersion (n)
The act of plunging or dipping entirely under water or another fluid.
immigrant
immigrant (n)
A foreigner who enters a country to settle there.
immigrate
immigrate (v)
To come into a country or region from a former habitat.
imminence
imminence (n)
Impending evil or danger.
imminent
imminent (adj)
Dangerous and close at hand.
immiscible
immiscible (adj)
Separating, as oil and water.
immoral
immoral (adj)
Habitually engaged in licentious or lewd practices.
immortalize
immortalize (v)
To cause to last or to be known or remembered throughout a great or indefinite length of time.
immovable
immovable (adj)
Steadfast.
immune
immune (adj)
Exempt, as from disease.
immutable
immutable (adj)
Unchangeable.
impair
impair (v)
To cause to become less or worse.
impalpable
impalpable (adj)
Imperceptible to the touch.
impartial
impartial (adj)
Unbiased.
impassable
impassable (adj)
That can not be passed through or over.
impassible
impassible (adj)
Not moved or affected by feeling.
impassive
impassive (adj)
Unmoved by or not exhibiting feeling.
impatience
impatience (n)
Unwillingness to brook delays or wait the natural course of things.
impeccable
impeccable (adj)
Blameless.
impecunious
impecunious (adj)
Having no money.
impede
impede (v)
To be an obstacle or to place obstacles in the way of.
impel
impel (v)
To drive or urge forward.
impend
impend (v)
To be imminent.
imperative
imperative (adj)
Obligatory.
imperceptible
imperceptible (adj)
Indiscernible.
imperfectible
imperfectible (adj)
That can not be perfected.
imperil
imperil (v)
To endanger.
imperious
imperious (adj)
Insisting on obedience.
impermissible
impermissible (adj)
Not permissible.
impersonal
impersonal (adj)
Not relating to a particular person or thing.
impersonate
impersonate (v)
To appear or act in the character of.
impersuadable
impersuadable (adj)
Unyielding.
impertinence
impertinence (n)
Rudeness.
imperturbable
imperturbable (adj)
Calm.
impervious
impervious (adj)
Impenetrable.
impetuosity
impetuosity (n)
Rashness.
impetuous
impetuous (adj)
Impulsive.
impetus
impetus (n)
Any impulse or incentive.
impiety
impiety (n)
Irreverence toward God.
impious
impious (adj)
Characterized by irreverence or irreligion.
implausible
implausible (adj)
Not plausible.
impliable
impliable (adj)
Capable of being inferred.
implicate
implicate (v)
To show or prove to be involved in or concerned
implicit
implicit (adj)
Implied.
imply
imply (v)
To signify.
impolitic
impolitic (adj)
Inexpedient.
importation
importation (n)
The act or practice of bringing from one country into another.
importunate
importunate (adj)
Urgent in character, request, or demand.
importune
importune (v)
To harass with persistent demands or entreaties.
impotent
impotent (adj)
Destitute of or lacking in power, physical, moral, or intellectual.
impoverish
impoverish (v)
To make indigent or poor.
impracticable
impracticable (adj)
Not feasible.
impregnable
impregnable (adj)
That can not be taken by assault.
impregnate
impregnate (v)
To make pregnant.
impromptu
impromptu (n)
Anything done or said on the impulse of the moment.
improper
improper (adj)
Not appropriate, suitable, or becoming.
impropriety
impropriety (n)
The state or quality of being unfit, unseemly, or inappropriate.
improvident
improvident (adj)
Lacking foresight or thrift.
improvise
improvise (v)
To do anything extemporaneously or offhand.
imprudent
imprudent (adj)
Heedless.
impudence
impudence (n)
Insolent disrespect.
impugn
impugn (v)
To assail with arguments, insinuations, or accusations.
impulsion
impulsion (n)
Impetus.
impulsive
impulsive (adj)
Unpremeditated.
impunity
impunity (n)
Freedom from punishment.
impure
impure (adj)
Tainted.
impute
impute (v)
To attribute.
inaccessible
inaccessible (adj)
Difficult of approach.
inaccurate
inaccurate (adj)
Not exactly according to the facts.
inactive
inactive (adj)
Inert.
inadequate
inadequate (adj)
Insufficient.
inadmissible
inadmissible (adj)
Not to be approved, considered, or allowed, as testimony.
inadvertent
inadvertent (adj)
Accidental.
inadvisable
inadvisable (adj)
Unadvisable.
inane
inane (adj)
Silly.
inanimate
inanimate (adj)
Destitute of animal life.
inapprehensible
inapprehensible (adj)
Not to be understood.
inapt
inapt (adj)
Awkward or slow.
inarticulate
inarticulate (adj)
Speechless.
inaudible
inaudible (adj)
That can not be heard.
inborn
inborn (adj)
Implanted by nature.
inbred
inbred (adj)
Innate.
incandescence
incandescence (n)
The state of being white or glowing with heat.
incandescent
incandescent (adj)
White or glowing with heat.
incapacitate
incapacitate (v)
To deprive of power, capacity, competency, or qualification.
incapacity
incapacity (n)
Want of power to apprehend, understand, and manage.
incarcerate
incarcerate (v)
To imprison.
incendiary
incendiary (n)
Chemical or person who starts a fire-literally or figuratively.
incentive
incentive (n)
That which moves the mind or inflames the passions.
inception
inception (n)
The beginning.
inceptive
inceptive (adj)
Beginning.
incessant
incessant (adj)
Unceasing.
inchmeal
inchmeal (adv)
Piecemeal.
inchoate
inchoate (adj)
Incipient.
inchoative
inchoative (n)
That which begins, or expresses beginning.
incidence
incidence (n)
Casual occurrence.
incident
incident (n)
A happening in general, especially one of little importance.
incidentally
incidentally (adv)
Without intention.
incinerate
incinerate (v)
To reduce to ashes.
incipience
incipience (n)
Beginning.
incipient
incipient (adj)
Initial.
incisor
incisor (n)
A front or cutting tooth.
incite
incite (v)
To rouse to a particular action.
incitement
incitement (n)
That which moves to action, or serves as an incentive or stimulus.
incoercible
incoercible (adj)
Incapable of being forced, constrained, or compelled.
incoherence
incoherence (n)
Want of connection, or agreement, as of parts or ideas in thought, speech, etc.
incoherent
incoherent (adj)
Not logically coordinated, as to parts, elements, or details.
incombustible
incombustible (adj)
That can not be burned.
incomparable
incomparable (adj)
Matchless.
incompatible
incompatible (adj)
Discordant.
incompetence
incompetence (n)
General lack of capacity or fitness.
incompetent
incompetent (adj)
Not having the abilities desired or necessary for any purpose.
incomplete
incomplete (adj)
Lacking some element, part, or adjunct necessary or required.
incomprehensible
incomprehensible (adj)
Not understandable.
incompressible
incompressible (adj)
Resisting all attempts to reduce volume by pressure.
inconceivable
inconceivable (adj)
Incomprehensible.
incongruous
incongruous (adj)
Unsuitable for the time, place, or occasion.
inconsequential
inconsequential (adj)
Valueless.
inconsiderable
inconsiderable (adj)
Small in quantity or importance.
inconsistent
inconsistent (adj)
Contradictory.
inconstant
inconstant (adj)
Changeable.
incontrovertible
incontrovertible (adj)
Indisputable.
inconvenient
inconvenient (adj)
Interfering with comfort or progress.
indefensible
indefensible (adj)
Untenable.
indefinitely
indefinitely (adv)
In a vague or uncertain way.
indelible
indelible (adj)
That can not be blotted out, effaced, destroyed, or removed.
indescribable
indescribable (adj)
That can not be described.
indestructible
indestructible (adj)
That can not be destroyed.
indicant
indicant (adj)
That which points out.
indicator
indicator (n)
One who or that which points out.
indict
indict (v)
To find and declare chargeable with crime.
indigence
indigence (n)
Poverty.
indigenous
indigenous (adj)
Native.
indigent
indigent (adj)
Poor.
indigestible
indigestible (adj)
Not digestible, or difficult to digest.