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impermeable

(adjective) preventing especially liquids to pass or diffuse through; "impermeable stone"; "an impermeable layer of scum"; "a coat impermeable to rain"

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imperturbable

(adjective satellite) not easily perturbed or excited or upset; marked by extreme calm and composure; "hitherto imperturbable, he now showed signs of alarm"; "an imperturbable self-possession"; "unflappable in a crisis"

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impervious

(adjective) not admitting of passage or capable of being affected; "a material impervious to water"; "someone impervious to argument"

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imperviousness

(noun) resistance to penetration by a liquid

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impetuous

(adjective satellite) characterized by undue haste and lack of thought or deliberation; "a hotheaded decision"; "liable to such impulsive acts as hugging strangers"; "an impetuous display of spending and gambling"; "madcap escapades"; (`brainish' is archaic)

(adjective satellite) marked by violent force; "impetuous heaving waves"

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impiety

(noun) unrighteousness by virtue of lacking respect for a god

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implacable

(adjective) impossible to placate; "an implacable enemy"

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implausibility

(noun) the quality of provoking disbelief

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implicate

(verb) impose, involve, or imply as a necessary accompaniment or result; "What does this move entail?"

(verb) bring into intimate and incriminating connection; "He is implicated in the scheme to defraud the government"

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implication

(noun) something that is inferred (deduced or entailed or implied); "his resignation had political implications"

(noun) a meaning that is not expressly stated but can be inferred; "the significance of his remark became clear only later"; "the expectation was spread both by word and by implication"

(noun) an accusation that brings into intimate and usually incriminating connection

(noun) a relation implicated by virtue of involvement or close connection (especially an incriminating involvement); "he was suspected of implication in several robberies"

(noun) a logical relation between propositions p and q of the form `if p then q'; if p is true then q cannot be false

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implicit

(adjective satellite) being without doubt or reserve; "implicit trust"

(adjective) implied though not directly expressed; inherent in the nature of something; "an implicit agreement not to raise the subject"; "there was implicit criticism in his voice"; "anger was implicit in the argument"; "the oak is implicit in the acorn"

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implosion

(noun) the initial occluded phase of a stop consonant

(noun) a sudden inward collapse; "the implosion of a light bulb"

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imply

(verb) express or state indirectly

(verb) suggest as a logically necessary consequence; in logic

(verb) have as a logical consequence; "The water shortage means that we have to stop taking long showers"

(verb) have as a necessary feature or consequence; entail; "This decision involves many changes"

(verb) suggest that someone is guilty

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importune

(verb) beg persistently and urgently; "I importune you to help them"

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impostor

(noun) a person who makes deceitful pretenses

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imprecation

(noun) the act of calling down a curse that invokes evil (and usually serves as an insult); "he suffered the imprecations of the mob"

(noun) a slanderous accusation

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impromptu

(noun) an extemporaneous speech or remark; "a witty impromptu must not sound premeditated"

(noun) a short musical passage that seems to have been made spontaneously without advance preparation

(adjective satellite) with little or no preparation or forethought; "his ad-lib comments showed poor judgment"; "an extemporaneous piano recital"; "an extemporary lecture"; "an extempore skit"; "an impromptu speech"; "offhand excuses"; "trying to sound offhanded and reassuring

(adverb) without advance preparation; "he spoke ad lib"

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impudence

(noun) the trait of being rude and impertinent; inclined to take liberties

(noun) an impudent statement

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impudent

(adjective satellite) improperly forward or bold; "don't be fresh with me"; "impertinent of a child to lecture a grownup"; "an impudent boy given to insulting strangers"

(adjective satellite) marked by casual disrespect; "a flip answer to serious question"; "the student was kept in for impudent behavior"

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impute

(verb) attribute or credit to; "We attributed this quotation to Shakespeare"; "People impute great cleverness to cats"

(verb) attribute (responsibility or fault) to a cause or source; "The teacher imputed the student's failure to his nervousness"

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inadvertent

(adjective satellite) without intention (especially resulting from heedless action); "with an inadvertent gesture she swept the vase off the table"; "accidental poisoning"; "an accidental shooting"

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inane

(adjective satellite) complacently or inanely foolish

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inaugurate

(verb) be a precursor of; "The fall of the Berlin Wall ushered in the post-Cold War period"

(verb) commence officially

(verb) open ceremoniously or dedicate formally

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incessant

(adjective satellite) occurring so frequently as to seem ceaseless or uninterrupted; "a child's incessant questions"; "your perpetual (or continual) complaints"

(adjective satellite) uninterrupted in time and indefinitely long continuing; "the ceaseless thunder of surf"; "in constant pain"; "night and day we live with the incessant noise of the city"; "the never-ending search for happiness"; "the perpetual struggle to maintain standar

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inchoate

(adjective satellite) only partly in existence; imperfectly formed; "incipient civil disorder"; "an incipient tumor"; "a vague inchoate idea"

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incise

(verb) make an incision into by carving or cutting

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incite

(verb) provoke or stir up; "incite a riot"; "set off great unrest among the people"

(verb) urge on; cause to act; "They other children egged the boy on, but he did not want to throw the stone through the window"

(verb) give an incentive for action; "This moved me to sacrifice my career"

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inclined

(adjective) at an angle to the horizontal or vertical position; "an inclined plane"

(adjective satellite) used especially of the head or upper back; "a bent head and sloping shoulders"

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incoherently

(adverb) in an incoherent manner; "he talked incoherently when he drank too much"

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incongruous

(adjective) lacking in harmony or compatibility or appropriateness; "a plan incongruous with reason"; "incongruous behavior"; "a joke that was incongruous with polite conversation"

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incredulous

(adjective) not disposed or willing to believe; unbelieving

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inculcate

(verb) teach and impress by frequent repetitions or admonitions; "inculcate values into the young generation"

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incursion

(noun) the act of entering some territory or domain (often in large numbers); "the incursion of television into the American livingroom"

(noun) the mistake of incurring liability or blame

(noun) an attack that penetrates into enemy territory

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indefatigability

(noun) tireless determination

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indelible

(adjective satellite) cannot be removed, washed away or erased; "an indelible stain"

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indelicate

(adjective satellite) verging on the indecent; "an indelicate proposition"

(adjective) lacking propriety and good taste in manners and conduct; "indecorous behavior"

(adjective satellite) in violation of good taste even verging on the indecent; "an indelicate remark"; "an off-color joke"

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indigence

(noun) a state of extreme poverty or destitution; "their indigence appalled him"; "a general state of need exists among the homeless"

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indigenous

(adjective satellite) originating where it is found; "the autochthonal fauna of Australia includes the kangaroo"; "autochthonous rocks and people and folktales"; "endemic folkways"; "the Ainu are indigenous to the northernmost islands of Japan"

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indistinct

(adjective) not clearly defined or easy to perceive or understand; "indistinct shapes in the gloom"; "an indistinct memory"; "only indistinct notions of what to do"

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indolence

(noun) inactivity resulting from a dislike of work

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indomitable

(adjective satellite) impossible to subdue

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indulge

(verb) yield (to); give satisfaction to

(verb) enjoy to excess

(verb) give free rein to; "The writer indulged in metaphorical language"

(verb) treat with excessive indulgence; "grandparents often pamper the children"; "Let's not mollycoddle our students!"

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indulgent

(adjective satellite) being favorably inclined; "an indulgent attitude"

(adjective) showing or characterized by or given to indulgence; "indulgent grandparents"

(adjective satellite) tolerant or lenient; "indulgent parents risk spoiling their children"; "procedures are lax and discipline is weak"; "too soft on the children"

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indulgent

(adjective satellite) being favorably inclined; "an indulgent attitude"

(adjective) showing or characterized by or given to indulgence; "indulgent grandparents"

(adjective satellite) tolerant or lenient; "indulgent parents risk spoiling their children"; "procedures are lax and discipline is weak"; "too soft on the children"

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ineffable

(adjective satellite) defying expression or description; "indefinable yearnings"; "indescribable beauty"; "ineffable ecstasy"; "inexpressible anguish"; "unspeakable happiness"; "unutterable contempt"; "a thing of untellable splendor"

(adjective satellite) too sacred to be uttered; "the ineffable name of the Deity"