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Divided from the set "SAT Words (5000) - freevocabulary.com"

illogical

Contrary to the rules of sound thought.

illuminant

That which may be used to produce light.

illuminate

To supply with light.

illumine

To make bright or clear.

illusion

An unreal image presented to the senses.

illusive

Deceptive.

illusory

Deceiving or tending to deceive, as by false appearance.

imaginable

That can be imagined or conceived in the mind.

imaginary

Fancied.

imbibe

To drink or take in.

imbroglio

A misunderstanding attended by ill feeling, perplexity, or strife.

imbrue

To wet or moisten.

imitation

That which is made as a likeness or copy.

imitator

One who makes in imitation.

immaculate

Without spot or blemish.

immaterial

Of no essential consequence.

immature

Not full-grown.

immeasurable

Indefinitely extensive.

immense

Very great in degree, extent, size, or quantity.

immerse

To plunge or dip entirely under water or other fluid.

immersion

The act of plunging or dipping entirely under water or another fluid.

immigrant

A foreigner who enters a country to settle there.

immigrate

To come into a country or region from a former habitat.

imminence

Impending evil or danger.

imminent

Dangerous and close at hand.

immiscible

Separating, as oil and water.

immoral

Habitually engaged in licentious or lewd practices.

immortalize

To cause to last or to be known or remembered throughout a great or indefinite length of time.

immovable

Steadfast.

immune

Exempt, as from disease.

immutable

Unchangeable.

impair

To cause to become less or worse.

impalpable

Imperceptible to the touch.

impartial

Unbiased.

impassable

That can not be passed through or over.

impassible

Not moved or affected by feeling.

impassive

Unmoved by or not exhibiting feeling.

impatience

Unwillingness to brook delays or wait the natural course of things.

impeccable

Blameless.

impecunious

Having no money.

impede

To be an obstacle or to place obstacles in the way of.

impel

To drive or urge forward.

impend

To be imminent.

imperative

Obligatory.

imperceptible

Indiscernible.

imperfectible

That can not be perfected.

imperil

To endanger.

imperious

Insisting on obedience.

impermissible

Not permissible.

impersonal

Not relating to a particular person or thing.

impersonate

To appear or act in the character of.

impersuadable

Unyielding.

impertinence

Rudeness.

imperturbable

Calm.

impervious

Impenetrable.

impetuosity

Rashness.

impetuous

Impulsive.

impetus

Any impulse or incentive.

impiety

Irreverence toward God.

impious

Characterized by irreverence or irreligion.

implausible

Not plausible.

impliable

Capable of being inferred.

implicate

To show or prove to be involved in or concerned

implicit

Implied.

imply

To signify.

impolitic

Inexpedient.

importation

The act or practice of bringing from one country into another.

importunate

Urgent in character, request, or demand.

importune

To harass with persistent demands or entreaties.

impotent

Destitute of or lacking in power, physical, moral, or intellectual.

impoverish

To make indigent or poor.

impracticable

Not feasible.

impregnable

That can not be taken by assault.

impregnate

To make pregnant.

impromptu

Anything done or said on the impulse of the moment.

improper

Not appropriate, suitable, or becoming.

impropriety

The state or quality of being unfit, unseemly, or inappropriate.

improvident

Lacking foresight or thrift.

improvise

To do anything extemporaneously or offhand.

imprudent

Heedless.

impudence

Insolent disrespect.

impugn

To assail with arguments, insinuations, or accusations.

impulsion

Impetus.

impulsive

Unpremeditated.

impunity

Freedom from punishment.

impure

Tainted.

impute

To attribute.

inaccessible

Difficult of approach.

inaccurate

Not exactly according to the facts.

inactive

Inert.

inadequate

Insufficient.

inadmissible

Not to be approved, considered, or allowed, as testimony.

inadvertent

Accidental.

inadvisable

Unadvisable.

inane

Silly.

inanimate

Destitute of animal life.

inapprehensible

Not to be understood.

inapt

Awkward or slow.

inarticulate

Speechless.

inaudible

That can not be heard.

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