improvise (v.)youdaoicibaDictYouDict[improvise 词源字典]
1826, back-formation from improvisation, or else from French improviser (17c.), from Italian improvisare "to sing or speak extempore," from improviso, from Latin improvisus "unforeseen, unexpected" (see improvisation). Or possibly a back-formation from improvisation. Related: Improvised; improvising.[improvise etymology, improvise origin, 英语词源]
improvision (n.)youdaoicibaDictYouDict
"want of forethought," 1640s, from assimilated form of in- (1) "not, opposite of" + provision.
imprudence (n.)youdaoicibaDictYouDict
early 15c., "quality of rashness or heedlessness; imprudent act," from Latin imprudentia "lack of foresight, inconsiderateness, ignorance, inadvertence," noun of quality from imprudens (see imprudent).
imprudent (adj.)youdaoicibaDictYouDict
late 14c., from Latin imprudentem (nominative imprudens) "not foreseeing, unaware, inconsiderate, heedless," from assimilated form of in- "not, opposite of" (see in- (1)) + prudens, contraction of providens, present participle of providere "to provide," literally "to see before (one)" (see provide). Related: Imprudently.
impudence (n.)youdaoicibaDictYouDict
late 14c., from Latin impudentia "shamelessness," noun of quality from impudens; see impudent.
impudent (adj.)youdaoicibaDictYouDict
late 14c., from Latin impudentem (nominative impudens) "without shame, shameless," from assimilated form of in- "not, opposite of" (see in- (1)) + pudens "ashamed, modest," present participle of pudere "to cause shame" (see pudendum). Related: Impudently.
impugn (v.)youdaoicibaDictYouDict
"attack by argument," late 14c., from Old French impugner, from Latin impugnare "to assault, to attack," from assimilated form of in- "into, in, on, upon" (see in- (2)) + pugnare "to fight" (see pugnacious). Related: Impugned; impugning.
impulse (n.)youdaoicibaDictYouDict
early 15c., "an act of impelling, a thrust, push," from Latin impulsus "a push against, pressure, shock," also "incitement, instigation, impulse," past participle of impellere (see impel). Meaning "stimulus in the mind arising from some state or feeling" first recorded 1640s.
impulsion (n.)youdaoicibaDictYouDict
early 15c., "driving, pushing, thrusting," from Old French impulsion (early 14c.), from Latin impulsionem (nominative impulsio) "external pressure," figuratively "incitement, instigation," noun of action from past participle stem of impellere (see impel).
impulsive (adj.)youdaoicibaDictYouDict
early 15c., originally in reference to medicine that reduces swelling or humors, from Middle French impulsif or directly from Medieval Latin impulsivus, from Latin impuls-, past participle stem of impellere (see impel). Of persons, "rash, characterized by impulses," from 1847.
impulsively (adv.)youdaoicibaDictYouDict
1768; see impulsive + -ly (2).
impulsiveness (n.)youdaoicibaDictYouDict
1650s; see impulsive + -ness.
impulsivity (n.)youdaoicibaDictYouDict
1891; see impulsive + -ity.
impune (adj.)youdaoicibaDictYouDict
"unpunished" (obsolete), 1610s, from Latin impunis "unpunished," from assimilated form of in- "not, opposite of" (see in- (1)) + poena (see penal).
impunity (n.)youdaoicibaDictYouDict
1530s, from Middle French impunité (14c.) and directly from Latin impunitatem (nominative impunitas) "freedom from punishment, omission of punishment," also "rashness, inconsideration," from impunis "unpunished, without punishment," from assimilated form of in- "not, opposite of" (see in- (1)) + poena "punishment" (see penal).
impure (adj.)youdaoicibaDictYouDict
mid-15c., from Middle French impur (13c.), from Latin impurus "unclean, filthy, foul," from assimilated form of in- "not, opposite of" (see in- (1)) + purus "pure" (see pure). As a noun from 1784. Related: Impurely.
impurity (n.)youdaoicibaDictYouDict
mid-15c., "thing which makes or is impure;" c. 1500, "fact or quality of being impure," from Middle French impurité, from impur (see impure). Related: Impurities.
imputable (adj.)youdaoicibaDictYouDict
1620s, from Medieval Latin imputabilis, from Latin imputare (see impute).
imputation (n.)youdaoicibaDictYouDict
1540s, noun of action from impute (v.) on model of Middle French imputation, or else from Late Latin imputationem (nominative imputatio), noun of action from imputare.
impute (v.)youdaoicibaDictYouDict
early 15c., from Old French imputer (14c.) and directly from Latin imputare "to reckon, make account of, charge, ascribe," from assimilated form of in- "in, into" (see in- (2)) + putare "reckon, clear up, trim, prune, settle" (see pave). Related: Imputed; imputing.