英语词源字典 - 在线词源网站

informative (adj.)[informative 词源字典]: "instructive," late 14c., "formative, shaping, plastic," from Medieval Latin informativus, from Latin informatus, past participle of informare (see inform). Related: Informatively.[informative etymology, informative origin, 英语词源]
informer (n.): late 14c., enfourmer "instructor, teacher," native agent noun from inform and also from Old French enformeor. Meaning "one who gives information against another" (especially in reference to law-breaking) is c. 1500.
infotainment (n.): 1983, from info- + entertainment.
infra (adv.): "under, below, further on," from Latin infra (see infra-).
infra dig.: 1824, colloquial abbreviation of Latin infra dignitatem "beneath the dignity of."
infra-: word-forming element from Latin infra (adv., prep.) "below, underneath, beneath; later than, smaller, inferior to," from PIE *ndher "under" (cognates: Sanskrit adnah "below," Old English under "under, among;" see under). Opposed to super-. Its use as a prefix was rare in Latin.
infra-red: also infrared, 1881 (noun and adjective), from infra- + red.
infraction (n.): mid-15c., "the breaking of an agreement," from Middle French infraction and directly from Latin infractionem (nominative infractio) "a breaking, weakening," noun of action from past participle stem of infringere "to break, crush" (see infringe).
infralapsarian (adj.): 1731, from infra- + Latin lapsus "a fall" (see lapse (n.)) + ending from unitarian, etc. In reference to the Calvinist doctrine that god's election of some to everlasting life was consequent to his decree to allow the Fall of man, and was thus a remedial measure. Contrasted to supralapsarian, in reference to the belief that He always meant to consign most of mankind to eternal fire and that the decision to create some men to be damned was his first decree. There's also a moderate sublapsarian view. Here the decree to elect those who would believe and leave those who do not believe to damnation also comes after the decree to allow the fall, but the decree to provide salvation for man comes immediately after the decree to elect.
infrasonic (adj.): 1927, from infra- + sonic.
infrastructure (n.): 1887, from French infrastructure (1875); see infra- + structure (n.). The installations that form the basis for any operation or system. Originally in a military sense.
infrequency (n.): c. 1600, from Latin infrequentia "a small number, thinness, scantiness," noun of quality from infrequentem (see infrequent). Related: Infrequence (1640s).
infrequent (adj.): 1530s, from Latin infrequentem (nominative infrequens) "occurring seldom, unusual; not crowded, absent," from in- "not" (see in- (1)) + frequens (see frequent). Related: Infrequently.
infrigidation (n.): early 15c., from Late Latin infrigidationem (nominative infrigidatio), noun of action from infrigidare "to make cold," from in- "in, into" (see in- (2)) + frigidare, from frigidus "cold" (see frigid). Related: infrigidate (v.).
infringe (v.): mid-15c., enfrangen, "to violate," from Latin infringere "to damage, break off, break, bruise," from in- "in" (see in- (2)) + frangere "to break" (see fraction). Meaning of "encroach" first recorded c. 1760. Related: Infringed; infringing.
infringement (n.): 1590s, from infringe + -ment.
infundibulum (n.): 1799 in the anatomical sense, from Latin infundibulum, literally "a funnel," from infundere "to pour into" (see infuse) + -bulum, suffix forming names of instruments. In some cases a loan-translation into Latin of Greek khoane "funnel." Related: Infundibular.
infuriate (v.): 1660s, from Italian infuriato, from Medieval Latin infuriatus, past participle of infuriare "to madden," from Latin in furia "in a fury," from ablative of furia (see fury). Related: Infuriated; infuriating; infuriatingly.
infuse (v.): early 15c., "to pour in, introduce, soak," from Latin infusus, past participle of infundere "to pour into," from in- "in" (see in- (2)) + fundere "pour, spread" (see found (v.2)). Figurative sense of "instill, inspire" first recorded 1520s (infusion in this sense dates from mid-15c.). Related: Infused; infusing.
infusion (n.): c. 1400, from Old French infusion (13c.) or directly from Latin infusionem (nominative infusio), noun of action from past participle stem of infundere (see infuse).