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vicar [vicar 词源字典]: vicar: [13] A vicar is etymologically a ‘substitute’ for or ‘representative’ of someone else: thus the pope is the vicar of God on Earth, and the vicar of a parish was originally someone who stood in for the parson or rector. The word comes via Old French vicaire from Latin vicārius ‘substitute, deputy’. This was a noun use of the adjective vicārius ‘substituting’ (source of English vicarious [17], which more closely preserves the meaning of its Latin original). And vicārius in turn was derived from vicis ‘change, turn, office’, source also of English vicissitude [16] and the prefix vice-.
=> vicarious, vicissitude[vicar etymology, vicar origin, 英语词源]
chiliasm (n.): c. 1600, from Latinized form of Greek khiliasmos, from khilias, from khilioi "a thousand, the number 1,000," which is of unknown origin; supposed by some to be related to Latin mille. The doctrine of the millennium, the opinion that Christ will reign in bodily presence on earth for 1,000 years. Related: Chiliast; chiliastic.
Doomsday (n.): Old English domes dæg, from domes, genitive of dom (see doom (n.)) + dæg "day" (see day (n.)).

In medieval England it was expected when the world's age reached 6,000 years from creation, which was thought to have been in 5200 B.C. Bede, c.720, complained of being pestered by rustici asking him how many years till the sixth millennium ended. There is no evidence for a general panic in the year 1000 C.E. Doomsday machine "bomb powerful enough to wipe out human life on earth" is from 1960.
global warming (n.): by 1983 as the name for a condition of overall rising temperatures on Earth and attendant consequences as a result of human activity. Originally theoretical, popularized as a reality from 1989.
humanity (n.): late 14c., "kindness, graciousness," from Old French humanité, umanité "human nature; humankind, life on earth; pity," from Latin humanitatem (nominative humanitas) "human nature; philanthropy, kindness; good breeding, refinement; the human race, mankind," from humanus (see human). Sense of "human nature, human form" is c. 1400; that of "human race" first recorded mid-15c.
millennium (n.): 1630s, from Modern Latin millennium, from Latin mille "thousand" (see million) + annus "year" (see annual); formed on analogy of biennium, triennium, etc. For vowel change, see biennial. First in English in sense of "1,000-year period of Christ's anticipated rule on Earth" (Rev. xx:1-5). Sense of "any 1,000-year period" first recorded 1711. Meaning "the year 2000" attested from 1970.
world (n.): Old English woruld, worold "human existence, the affairs of life," also "a long period of time," also "the human race, mankind, humanity," a word peculiar to Germanic languages (cognates: Old Saxon werold, Old Frisian warld, Dutch wereld, Old Norse verold, Old High German weralt, German Welt), with a literal sense of "age of man," from Proto-Germanic *wer "man" (Old English wer, still in werewolf; see virile) + *ald "age" (see old).

Originally "life on earth, this world (as opposed to the afterlife)," sense extended to "the known world," then to "the physical world in the broadest sense, the universe" (c. 1200). In Old English gospels, the commonest word for "the physical world," was Middangeard (Old Norse Midgard), literally "the middle enclosure" (see yard (n.1)), which is rooted in Germanic cosmology. Greek kosmos in its ecclesiastical sense of "world of people" sometimes was rendered in Gothic as manaseþs, literally "seed of man." The usual Old Norse word was heimr, literally "abode" (see home). Words for "world" in some other Indo-European languages derive from the root for "bottom, foundation" (such as Irish domun, Old Church Slavonic duno, related to English deep); the Lithuanian word is pasaulis, from pa- "under" + saule "sun."

Original sense in world without end, translating Latin saecula saeculorum, and in worldly. Latin saeculum can mean both "age" and "world," as can Greek aion. Meaning "a great quantity or number" is from 1580s. Out of this world "surpassing, marvelous" is from 1928; earlier it meant "dead." World Cup is by 1951; U.S. baseball World Series is by 1893 (originally often World's Series). World power in the geopolitical sense first recorded 1900. World-class is attested from 1950, originally of Olympic athletes.