| impermanency | (noun) the property of not existing for indefinitely long durations | Synonyms: impermanence |
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| impermeability | (noun) the property of something that cannot be pervaded by a liquid | Synonyms: impermeableness |
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| impermeableness | (noun) the property of something that cannot be pervaded by a liquid | Synonyms: impermeability |
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| impermissibility | (noun) inadmissibility as a consequence of not being permitted | - |
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| impersonation | (noun) imitating the mannerisms of another person | Synonyms: personation |
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| (noun) pretending to be another person | Synonyms: imposture |
| (noun) a representation of a person that is exaggerated for comic effect | Synonyms: caricature, imitation |
| impersonator | (noun) someone who (fraudulently) assumes the appearance of another | Synonyms: imitator |
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| impertinence | (noun) inappropriate playfulness | Synonyms: archness, perkiness, pertness, sauciness |
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| (noun) the trait of being rude and impertinent; inclined to take liberties | Synonyms: cheekiness, crust, freshness, gall, impudence, insolence |
| (noun) an impudent statement | Synonyms: cheek, impudence |
| imperturbability | (noun) calm and unruffled self-assurance | Synonyms: coolness, imperturbableness |
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| imperturbableness | (noun) calm and unruffled self-assurance | Synonyms: coolness, imperturbability |
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| imperviousness | (noun) the quality of being impenetrable (by people or light or missiles etc.) | Synonyms: impenetrability |
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| impetigo | (noun) a very contagious infection of the skin; common in children; localized redness develops into small blisters that gradually crust and erode | - |
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| impetuosity | (noun) rash impulsiveness | Synonyms: impetuousness |
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| impetuousness | (noun) rash impulsiveness | Synonyms: impetuosity |
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| impetus | (noun) the act of applying force suddenly | Synonyms: impulse, impulsion |
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| (noun) a force that moves something along | Synonyms: drift, impulsion |
| impiety | (noun) unrighteousness by virtue of lacking respect for a god | Synonyms: impiousness |
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| impingement | (noun) influencing strongly | Synonyms: encroachment, impact |
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| (noun) a sharp collision produced by striking or dashing against something | Synonyms: impaction |
| impinging | (noun) the physical coming together of two or more things | Synonyms: contact, striking |
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| impiousness | (noun) unrighteousness by virtue of lacking respect for a god | Synonyms: impiety |
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| impishness | (noun) the trait of behaving like an imp | Synonyms: mischievousness, puckishness, whimsicality |
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| implant | (noun) a prosthesis placed permanently in tissue | - |
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| implantation | (noun) the act of planting or setting in the ground | - |
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| (noun) a surgical procedure that places something in the human body | - |
| (noun) (embryology) the organic process whereby a fertilized egg becomes implanted in the lining of the uterus of placental mammals | Synonyms: nidation |
| implausibility | (noun) the quality of provoking disbelief | Synonyms: implausibleness |
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| implausibleness | (noun) the quality of provoking disbelief | Synonyms: implausibility |
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| implement | (noun) instrumentation (a piece of equipment or tool) used to effect an end | - |
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| implementation | (noun) the act of implementing (providing a practical means for accomplishing something); carrying into effect | Synonyms: effectuation |
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| (noun) the act of accomplishing some aim or executing some order | Synonyms: carrying out, execution |
| implication | (noun) a meaning that is not expressly stated but can be inferred | Synonyms: import, significance |
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| (noun) something that is inferred (deduced or entailed or implied) | Synonyms: deduction, entailment |
| (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) | - |
| (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 | Synonyms: conditional relation, logical implication |
| implicitness | (noun) inexplicitness as a consequence of being implied or indirect | - |
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| implosion | (noun) the initial occluded phase of a stop consonant | - |
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| (noun) a sudden inward collapse | - |
| impoliteness | (noun) a discourteous manner that ignores accepted social usage | - |
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| imponderable | (noun) a factor whose effects cannot be accurately assessed | - |
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| import | (noun) commodities (goods or services) bought from a foreign country | Synonyms: importation |
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| (noun) having important effects or influence | Synonyms: consequence, moment |
| (noun) a meaning that is not expressly stated but can be inferred | Synonyms: implication, significance |
| (noun) the message that is intended or expressed or signified | Synonyms: meaning, significance, signification |
| (noun) an imported person brought from a foreign country | Synonyms: importee |
| importance | (noun) the quality of being important and worthy of note | - |
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| (noun) a prominent status | Synonyms: grandness |
| importation | (noun) the commercial activity of buying and bringing in goods from a foreign country | Synonyms: importing |
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| (noun) commodities (goods or services) bought from a foreign country | Synonyms: import |
| importee | (noun) an imported person brought from a foreign country | Synonyms: import |
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| importer | (noun) someone whose business involves importing goods from outside (especially from a foreign country) | - |
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| importing | (noun) the commercial activity of buying and bringing in goods from a foreign country | Synonyms: importation |
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| importunateness | (noun) Quality of a person who is given to making importunate demands, being greedily or thoughtlessly demanding. | Synonyms: importunity |
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| importunity | (noun) Quality of a person who is given to making importunate demands, being greedily or thoughtlessly demanding. | Synonyms: importunateness |
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| (noun) insistent solicitation and entreaty | Synonyms: urgency, urging |
| imposition | (noun) the act of imposing something (as a tax or an embargo) | Synonyms: infliction |
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| (noun) an uncalled-for burden | - |
| impossibility | (noun) an alternative that is not available | Synonyms: impossible action |
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| (noun) incapability of existing or occurring | Synonyms: impossibleness |
| impossible | (noun) something that cannot be done | - |
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| impossibleness | (noun) incapability of existing or occurring | Synonyms: impossibility |
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| impost | (noun) the lowest stone in an arch -- from which it springs | Synonyms: springer |
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| (noun) money collected under a tariff | Synonyms: custom, customs, customs duty |
| imposter | (noun) a person who makes deceitful pretenses | Synonyms: fake, faker, fraud, impostor, pretender, pseud, pseudo, role player, sham, shammer |
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| impostor | (noun) a person who makes deceitful pretenses | Synonyms: fake, faker, fraud, imposter, pretender, pseud, pseudo, role player, sham, shammer |
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| imposture | (noun) pretending to be another person | Synonyms: impersonation |
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| impotence | (noun) the quality of lacking strength or power; being weak and feeble | Synonyms: impotency, powerlessness |
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| (noun) an inability (usually of the male animal) to copulate | Synonyms: impotency |
| impotency | (noun) the quality of lacking strength or power; being weak and feeble | Synonyms: impotence, powerlessness |
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| (noun) an inability (usually of the male animal) to copulate | Synonyms: impotence |
| impounding | (noun) placing private property in the custody of an officer of the law | Synonyms: impoundment, internment, poundage |
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| impoundment | (noun) placing private property in the custody of an officer of the law | Synonyms: impounding, internment, poundage |
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| impoverishment | (noun) the act of making someone poor | Synonyms: pauperisation, pauperization |
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| (noun) the state of having little or no money and few or no material possessions | Synonyms: poorness, poverty |
| impracticability | (noun) the quality of not being usable | Synonyms: impracticableness |
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| impracticableness | (noun) the quality of not being usable | Synonyms: impracticability |
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| impracticality | (noun) concerned with theoretical possibilities rather than actual use | - |
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| imprecation | (noun) the act of calling down a curse that invokes evil (and usually serves as an insult) | Synonyms: malediction |
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| (noun) a slanderous accusation | - |
| impreciseness | (noun) the quality of lacking precision | Synonyms: imprecision |
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| imprecision | (noun) the quality of lacking precision | Synonyms: impreciseness |
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| impregnability | (noun) having the strength to withstand attack | Synonyms: invulnerability |
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| impregnation | (noun) creation by the physical union of male and female gametes; of sperm and ova in an animal or pollen and ovule in a plant | Synonyms: fecundation, fertilisation, fertilization |
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| (noun) the process of totally saturating something with a substance | Synonyms: saturation |
| (noun) material with which something is impregnated | - |
| impresario | (noun) a sponsor who books and stages public entertainments | Synonyms: promoter, showman |
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| impress | (noun) the act of coercing someone into government service | Synonyms: impressment |
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| impression | (noun) an impressionistic portrayal of a person | - |
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| (noun) the act of pressing one thing on or into the surface of another | - |
| (noun) (dentistry) an imprint of the teeth and gums in wax or plaster | - |
| (noun) an outward appearance | Synonyms: effect |
| (noun) a vague idea in which some confidence is placed | Synonyms: belief, feeling, notion, opinion |
| (noun) a clear and telling mental image | Synonyms: mental picture, picture |
| (noun) a symbol that is the result of printing or engraving | Synonyms: stamp |
| (noun) all the copies of a work printed at one time | Synonyms: printing |
| (noun) a concavity in a surface produced by pressing | Synonyms: depression, imprint |
| impressionist | (noun) an artist who follows the theories of Impressionism | - |
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| impressiveness | (noun) splendid or imposing in size or appearance | Synonyms: grandness, magnificence, richness |
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| (noun) the quality of making a strong or vivid impression on the mind | - |
| impressment | (noun) the act of coercing someone into government service | Synonyms: impress |
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| imprimatur | (noun) formal and explicit approval | Synonyms: countenance, endorsement, indorsement, sanction, warrant |
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| imprint | (noun) a device produced by pressure on a surface | - |
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| (noun) a distinctive influence | - |
| (noun) an impression produced by pressure or printing | Synonyms: embossment |
| (noun) an identification of a publisher; a publisher's name along with the date and address and edition that is printed at the bottom of the title page | - |
| (noun) a concavity in a surface produced by pressing | Synonyms: depression, impression |
| imprinting | (noun) a learning process in early life whereby species specific patterns of behavior are established | - |
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| imprisonment | (noun) the act of confining someone in a prison (or as if in a prison) | Synonyms: internment |
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| (noun) putting someone in prison or in jail as lawful punishment | - |
| (noun) the state of being imprisoned | Synonyms: captivity, immurement, incarceration |
| improbability | (noun) the quality of being improbable | Synonyms: improbableness |
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| improbableness | (noun) the quality of being improbable | Synonyms: improbability |
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| impromptu | (noun) an extemporaneous speech or remark | - |
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| (noun) a short musical passage that seems to have been made spontaneously without advance preparation | - |
| improperness | (noun) an improper demeanor | Synonyms: impropriety |
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| impropriety | (noun) an act of undue intimacy | Synonyms: familiarity, indecorum, liberty |
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| (noun) an indecent or improper act | Synonyms: indecency |
| (noun) an improper demeanor | Synonyms: improperness |
| (noun) the condition of being improper | - |
| improvement | (noun) the act of improving something | - |
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| (noun) a change for the better; progress in development | Synonyms: advance, betterment |
| (noun) a condition superior to an earlier condition | Synonyms: melioration |
| improver | (noun) a component that is added to something to improve it | Synonyms: add-on, addition |
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| (noun) someone devoted to the promotion of human welfare and to social reforms | Synonyms: do-gooder, humanitarian |
| improvidence | (noun) a lack of prudence and care by someone in the management of resources | Synonyms: shortsightedness |
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| improvisation | (noun) an unplanned expedient | Synonyms: temporary expedient |
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| (noun) a performance given extempore without planning or preparation | Synonyms: extemporisation, extemporization |
| (noun) a creation spoken or written or composed extemporaneously (without prior preparation) | - |
| imprudence | (noun) a lack of caution in practical affairs | - |
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| impudence | (noun) the trait of being rude and impertinent; inclined to take liberties | Synonyms: cheekiness, crust, freshness, gall, impertinence, insolence |
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| (noun) an impudent statement | Synonyms: cheek, impertinence |
| impuissance | (noun) powerlessness revealed by an inability to act | Synonyms: helplessness, weakness |
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| impulse | (noun) the act of applying force suddenly | Synonyms: impetus, impulsion |
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| (noun) an impelling force or strength | Synonyms: momentum |
| (noun) the electrical discharge that travels along a nerve fiber | Synonyms: nerve impulse, nervous impulse, neural impulse |
| (noun) (electronics) a sharp transient wave in the normal electrical state (or a series of such transients) | Synonyms: pulsation, pulse, pulsing |
| (noun) a sudden desire | Synonyms: caprice, whim |
| (noun) an instinctive motive | Synonyms: urge |
| impulsion | (noun) the act of applying force suddenly | Synonyms: impetus, impulse |
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| (noun) a force that moves something along | Synonyms: drift, impetus |
| impulsiveness | (noun) the trait of acting suddenly on impulse without reflection | - |
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| impunity | (noun) exemption from punishment or loss | - |
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| impureness | (noun) the condition of being impure | Synonyms: impurity |
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| impurity | (noun) the condition of being impure | Synonyms: impureness |
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| (noun) worthless or dangerous material that should be removed | Synonyms: dross |
| imputation | (noun) the attribution to a source or cause | - |
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| (noun) a statement attributing something dishonest (especially a criminal offense) | - |
| inanimacy | (noun) (linguistics) The characteristic of a noun, in some languages, that is dependent on its unliving or non-sentient nature; this characteristic affects grammatical features (it can modify verbs used with the noun, affect the noun's declension etc). | - |
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| inanimateness | (noun) not having life | Synonyms: lifelessness |
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| incrimination | (noun) an accusation that you are responsible for some lapse or misdeed | Synonyms: blame, inculpation |
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| infinitesimal | (noun) (mathematics) a variable that has zero as its limit | - |
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| infliximab | (noun) an anti-TNF compound (trade name Remicade) consisting of an antibody directed against TNF; it is given intravenously at one-month to three-month intervals; used in treatment of regional enteritis and rheumatoid arthritis | Synonyms: Remicade |
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| (noun) a monoclonal antibody (trade name Remicade) used to treat Crohn's disease and rheumatoid arthritis; administered by infusion; use and dosage must be determined by a physician | Synonyms: Remicade |
| interim | (noun) the time between one event, process, or period and another | Synonyms: lag, meantime, meanwhile |
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| intima | (noun) the innermost membrane of an organ (especially the inner lining of an artery or vein or lymphatic vessel) | - |
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| intimacy | (noun) close or warm friendship | Synonyms: closeness, familiarity |
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| (noun) a feeling of being intimate and belonging together | Synonyms: closeness |
| (noun) a usually secretive or illicit sexual relationship | Synonyms: affair, affaire, amour, involvement, liaison |
| intimate | (noun) someone to whom private matters are confided | Synonyms: confidant |
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| intimation | (noun) a slight suggestion or vague understanding | Synonyms: glimmer, glimmering, inkling |
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| (noun) an indirect suggestion | Synonyms: breath, hint |
| intimidation | (noun) the act of intimidating a weaker person to make them do something | Synonyms: bullying |
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| (noun) a communication that makes you afraid to try something | Synonyms: determent, deterrence |
| (noun) the feeling of being intimidated; being made to feel afraid or timid | - |
| (noun) the feeling of discouragement in the face of someone's superior fame or wealth or status etc. | - |
| isocheim | (noun) a line on a map connecting places with the same mean winter temperature. | - |
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