antitype (n.) Look up antitype at Dictionary.com
also anti-type, 1610s, from Greek antitypos "corresponding in form," literally "struck back, responding as an impression to a die," from anti- (see anti-) + typos "a blow, mark" (see type (n.)).
antivenin (n.) Look up antivenin at Dictionary.com
1894, from anti- + venin, from venom + chemical suffix -in (2). Perhaps immediately from French antivenin.
antivirus (n.) Look up antivirus at Dictionary.com
1903, from anti- + virus.
antler (n.) Look up antler at Dictionary.com
late 14c., from Anglo-French auntiler, Old French antoillier (14c., Modern French andouiller) "antler," perhaps from Gallo-Roman cornu *antoculare "horn in front of the eyes," from Latin ante "before" (see ante) + ocularis "of the eyes" (see ocular). This etymology is doubted by some because no similar word exists in any other Romance language, but compare German Augensprossen "antlers," literally "eye-sprouts," for a similar formation.
Antonia Look up Antonia at Dictionary.com
fem. proper name, from Latin Antonia, fem. of Antonius (see Anthony).
Antonine (adj.) Look up Antonine at Dictionary.com
1680s, in reference to Roman emperors Antoninus Pius (ruled 138-161 C.E.) and Marcus Aurelius Antoninus (161-180).
antonomasia (n.) Look up antonomasia at Dictionary.com
use of an epithet for a proper name (or vice versa; as in His Holiness for the name of a pope), 1580s, from Latin, from Greek antonomasia, from antonomazein "to name instead, call by a new name," from anti "instead" (see anti-) + onomazein "to name," from onoma "name" (see name (n.)).
Antony Look up Antony at Dictionary.com
masc. proper name, from Latin Antonius, name of a Roman gens (see Anthony).
antonym (n.) Look up antonym at Dictionary.com
1867, coined to serve as opposite of synonym, from Greek anti- "equal to, instead of, opposite" (see anti-) + -onym "name" (see name (n.)). Perhaps introduced to English in the book "Synonyms and Antonyms" (1867) by the Ven. C.J. Smith, M.A.
UNDER the head of Synonyms and Antonyms, Archdeacon Smith arranges words which form an antithesis to one another. The word "antonym" is, we believe, a new formation but useful. ["Journal of Sacred Literature," July 1867]
French antonyme (1842), German antonym (by 1859) are older. The un-Greek alternative counterterm has been left to fade.
antrum (n.) Look up antrum at Dictionary.com
"a cave or cavity," late 14c., medical Latin, from Greek antron "cave."
antsy (adj.) Look up antsy at Dictionary.com
1838, American English, from plural of ant + -y (2); probably reflecting the same image as the slang expression have ants in (one's) pants "be restless and fidgety" from a century later. Related: Antsiness.
Antwerp Look up Antwerp at Dictionary.com
port city in Belgium, French Anvers, from a Germanic compound of *anda "at" + *werpum "wharf" (see wharf). Folk etymology connects the first word with hand.
Anubis Look up Anubis at Dictionary.com
jackal-headed god of Egyptian religion, from Greek Anoubis, from Egyptian Anpu.
anuria (n.) Look up anuria at Dictionary.com
1838, medical Latin, from Greek an-, privative prefix (see an- (1)), + ouron "urine" (see urine) + abstract noun ending -ia.
anus (n.) Look up anus at Dictionary.com
"inferior opening of the alimentary canal," 1650s, from Old French anus, from Latin anus "ring, anus," from PIE root *ano- "ring." So called for its shape; compare Greek daktylios "anus," literally "ring (for the finger)," from daktylos "finger."
anvil (n.) Look up anvil at Dictionary.com
Old English anfilt, a Proto-Germanic compound (cognates: Middle Dutch anvilt, Old High German anafalz, Dutch aanbeeld, Danish ambolt "anvil") from *ana- "on" + *filtan "hit" (see felt (n.)). The ear bone so called from 1680s. Anvil Chorus is based on the "Gypsy Song" that opens Act II of Giuseppe Verdi's opera "Il Trovatore," first performed in Teatro Apollo, Rome, Jan. 19, 1853.
anxiety (n.) Look up anxiety at Dictionary.com
1520s, from Latin anxietatem (nominative anxietas) "anguish, anxiety, solicitude," noun of quality from anxius (see anxious). Psychiatric use dates to 1904. Age of Anxiety is from Auden's poem (1947). For "anxiety, distress," Old English had angsumnes, Middle English anxumnesse.
anxious (adj.) Look up anxious at Dictionary.com
1620s, from Latin anxius "solicitous, uneasy, troubled in mind" (also "causing anxiety, troublesome"), from angere, anguere "choke, squeeze," figuratively "torment, cause distress" (see anger (v.)). The same image is in Serbo-Croatian tjeskoba "anxiety," literally "tightness, narrowness." Related: Anxiously; anxiousness.
any (adj.) Look up any at Dictionary.com
Old English ænig "any, anyone," literally "one-y," from Proto-Germanic *ainagas (source also of Old Saxon enig, Old Norse einigr, Old Frisian enich, Dutch enig, German einig), from PIE *oi-no- "one, unique" (see one). The -y may have diminutive force here.

Emphatic form any old ______ (British variant: any bloody ______) is recorded from 1896. At any rate is recorded from 1847. Among the large family of compounds beginning with any-, anykyn "any kind" (c. 1300) did not survive, and Anywhen (1831) is rarely used, but OED calls it "common in Southern [British] dialects."
anybody (n.) Look up anybody at Dictionary.com
c. 1300, ani-bodi, from any + body. One-word form is attested by 1826. Phrase anybody's game (or race, etc.) is from 1840.
anyhow (adv.) Look up anyhow at Dictionary.com
1740, from any + how (adv.). Unlike the cases of most other any + (interrogative) compounds, there is no record of it in Old or Middle English. Emphatic form any old how is recorded from 1900, American English.
anymore (adv.) Look up anymore at Dictionary.com
one-word form by 1865, from any + more.
anyone (n.) Look up anyone at Dictionary.com
Old English, two words, from any + one. Old English also used ænigmon in this sense. One-word form from 1844.
anyplace (n.) Look up anyplace at Dictionary.com
1911, from any + place.
anything (n.) Look up anything at Dictionary.com
late Old English aniþing, from any + thing. But Old English ænig þinga apparently also meant "somehow, anyhow" (glossing Latin quoquo modo).
anythingarian (n.) Look up anythingarian at Dictionary.com
"one indifferent to religious creeds," c. 1704, originally dismissive, from anything on model of trinitarian, unitarian, etc.
anytime (adv.) Look up anytime at Dictionary.com
one-word form by 1854, from any + time (n.).
anyway (adv.) Look up anyway at Dictionary.com
1560s, any way "in any manner;" variant any ways (with adverbial genitive) attested from c. 1560, prepositional phrase by any way is from late 14c.; see any + way (n.). One-word form predominated from 1830s. As an adverbial conjunction, from 1859. Middle English in this sense had ani-gates "in any way, somehow" (c. 1400).
anyways (adv.) Look up anyways at Dictionary.com
see anyway.
anywhere (adv.) Look up anywhere at Dictionary.com
late 14c., from any + where. Earlier words in this sense were owhere, oughwhere, aywhere, literally "aught where" (see aught (1)).
anywise (adv.) Look up anywise at Dictionary.com
Old English ænige wisan, from any + wise (n.). One-word form from c. 1200.
Anzac Look up Anzac at Dictionary.com
1915, acronym of Australian and New Zealand Army Corps. First used in reference to the Gallipoli campaign.
AOL Look up AOL at Dictionary.com
dominant online service of the late 1990s, initialism (acronym) of America Online, company name from late 1989.
aorist (n.) Look up aorist at Dictionary.com
1580s, the simple past tense of Greek verbs, from Greek aoristos (khronos) "indefinite (tense)," from privative prefix a- "not" (see a- (3)) + horistos "limited, defined," verbal adjective from horizein "to limit, define," from horos "boundary, limit, border" (see horizon).
aorta (n.) Look up aorta at Dictionary.com
1570s, from Medieval Latin aorta, from Greek aorte, term applied by Aristotle to the great artery of the heart, literally "what is hung up," from aeirein "to lift, heave, raise," which is of uncertain origin; related to the second element in meteor. Used earlier by Hippocrates of the bronchial tubes. Related: Aortal; aortic.
AP Look up AP at Dictionary.com
abbreviation of Associated Press, first recorded 1879; the organization was founded May 1848 as co-operative news gathering effort among New York City newspaper publishers covering the war with Mexico.
ap- (2) Look up ap- at Dictionary.com
patronymic prefix in Welsh names, earlier map "son," cognate with Gaelic mac. Since 17c. merged into surnames (Ap Rhys = Price, Ap Evan = Bevan, etc.).
It is said that a Welshman who evidently was not willing to be surpassed in length of pedigree, when making out his genealogical tree, wrote near the middle of his long array of 'aps' -- "about this time Adam was born." ["Origin and Significance of our Names," "The Chautauquan," Oct. 1887-July 1888]
ap- (1) Look up ap- at Dictionary.com
form of Latin ad- before words beginning in -p-; see ad-.
apace (adv.) Look up apace at Dictionary.com
mid-14c., from a pace, literally "at a pace," but usually with a sense of "at a good pace," from a- (1) "on" + pace (n.).
Apache Look up Apache at Dictionary.com
1745, from American Spanish (1598), probably from Yavapai (a Yuman language) 'epache "people." Sometimes derived from Zuni apachu "enemy" (see F.W. Hodge, "American Indians," 1907), but this seems to have been the Zuni name for the Navajo.

French journalistic sense of "Parisian gangster or thug" first attested 1902. Apache dance was the World War I-era equivalent of 1990s' brutal "slam dancing." Fenimore Cooper's Indian novels were enormously popular in Europe throughout the 19c., and comparisons of Cooper's fictional Indian ways in the wilderness and underworld life in European cities go back to Dumas' "Les Mohicans de Paris" (1854-1859). It is probably due to the imitations of Cooper (amounting almost to plagiarisms) by German author Karl May (1842-1912) that Apaches replaced Mohicans in popular imagination. Also compare Mohawk.
apanage (n.) Look up apanage at Dictionary.com
see appanage.
apart (adv.) Look up apart at Dictionary.com
late 14c., from Old French à part "to the side," from Latin ad "to" (see ad-) + partem, accusative of pars "a side" (see part (n.)).
apartheid (n.) Look up apartheid at Dictionary.com
1947 (policy begun 1948), from Afrikaans apartheid (1929 in a South African socio-political context), literally "separateness," from Dutch apart "separate" (from French àpart; see apart) + suffix -heid, cognate of English -hood. The official English synonym was separate development (1955).
"Segregation" is such an active word that it suggests someone is trying to segregate someone else. So the word "apartheid" was introduced. Now it has such a stench in the nostrils of the world, they are referring to "autogenous development." [Alan Paton, "New York Times," Oct. 24, 1960]
apartment (n.) Look up apartment at Dictionary.com
1640s, "private rooms for the use of one person within a house," from French appartement (16c.), from Italian appartimento, literally "a separated place," from appartere "to separate," from a "to" (see ad-) + parte "side, place," from Latin partem (see part (n.)). Sense of "set of private rooms in a building entirely of these" (the U.S. equivalent of British flat) is first attested 1874.
apathetic (adj.) Look up apathetic at Dictionary.com
1744, from apathy + -ic, on model of pathetic.
apathy (n.) Look up apathy at Dictionary.com
c. 1600, "freedom from suffering," from French apathie (16c.), from Latin apathia, from Greek apatheia "freedom from suffering, impassability, want of sensation," from apathes "without feeling, without suffering or having suffered," from a- "without" (see a- (3)) + pathos "emotion, feeling, suffering" (see pathos). Originally a positive quality; sense of "indolence of mind, indifference to what should excite" is from c. 1733.
APB Look up APB at Dictionary.com
also a.p.b., 1960, police jargon initialism (acronym) for all-points bulletin, itself attested by 1953 (perhaps more in the jargon of detective novels than in actual police use).
ape (n.) Look up ape at Dictionary.com
Old English apa "ape, monkey," from Proto-Germanic *apan (source also of Old Saxon apo, Old Norse api, Dutch aap, German affe), perhaps borrowed in Proto-Germanic from Celtic (compare Old Irish apa) or Slavic (compare Old Bohemian op, Slovak opitza), perhaps ultimately from a non-Indo-European language.

Apes were noted in medieval times for mimicry of human action, hence, perhaps, the other figurative use of the word, to mean "a fool." To go ape (in emphatic form, go apeshit) "go crazy" is 1955, U.S. slang. To lead apes in hell (1570s) was the fancied fate of one who died an old maid.
ape (v.) Look up ape at Dictionary.com
"to imitate," 1630s, but the notion is implied earlier, as in the phrase play the ape (1570s), Middle English apeshipe "ape-like behavior, simulation" (mid-15c.); and the noun sense of "one who mimics" may date from early 13c. Related: Aped; aping.
ape-man (n.) Look up ape-man at Dictionary.com
hypothetical "missing link," 1879, in a translation of Haeckel, from ape (n.) + man (n.). Man-ape is attested from 1878. The name Martin Halfape appears in an English roll from 1227.