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razor [razor 词源字典]: razor: [13] A razor is etymologically a ‘scraper’. The word was borrowed from Old French rasor, a derivative of raser ‘scrape, shave’ (from which English gets raze [16]). This in turn went back via Vulgar Latin *rasāre to Latin rādere ‘scrape’, source also of English abrade [17], erase, and possibly rascal.
=> abrade, erase, rascal[razor etymology, razor origin, 英语词源]
Amazon (n.): late 14c., from Greek Amazon (mostly in plural Amazones) "one of a race of female warriors in Scythia," probably from an unknown non-Indo-European word, possibly from an Iranian compound *ha-maz-an- "(one) fighting together" [Watkins], but in folk etymology long derived from a- "without" + mazos "breasts," hence the story that the Amazons cut or burned off one breast so they could draw bowstrings more efficiently.

The river in South America (originally called by the Spanish Rio Santa Maria de la Mar Dulce) rechristened by Francisco de Orellana, 1541, after an encounter with female warriors of the Tapuyas (or, as some say, beardless, long-haired male tribesmen; still others hold that the name is a corruption of a native word in Tupi or Guarani meaning "wave").
azo-: word-forming element denoting the presence of nitrogen, 1879, from comb. form of azote, the old term for "nitrogen" (from Greek a- "not, without" (see a- (3)) + zoion "a living being;" see zoo); coined in French by Lavoisier & de Morveau because living things cannot survive in the gas.
azoic (adj.): "pertaining to the period of Earth's history before life appeared," 1854, with -ic + Greek azoos, from a- "not, without" (see a- (3)) + zoon "animal," here used in the sense "life" (see zoo).
azotemia (n.): 1900, also azotaemia, from azote "nitrogen" (see azo-) + -emia "blood."
bazooka (n.): "metal tube rocket launcher," 1942, from name of a junkyard musical instrument used (c. 1935) as a prop by U.S. comedian Bob Burns (1896-1956); extension of bazoo, slang for "mouth" or "boastful talk" (1877), probably from Dutch bazuin "trumpet."
bazooms (n.): "woman's breasts," especially when deemed prominent, 1955, American English slang alteration of bosoms.
blazon (n.): "coat of arms," late 13c., from Old French blason (12c.) "a shield, blazon," also "collar bone;" common Romanic (compare Spanish blason, Italian blasone, Portuguese brasao, Provençal blezo, the first two said to be French loan-words); of uncertain origin. OED doubts, on grounds of sense, the connection proposed by 19c. French etymologists to Germanic words related to English blaze (n.1).
blazon (v.): 1560s, "to depict or paint (armorial bearings)," from blazon (n.) or else from French blasonner. Earlier as "to set forth decriptively" (1510s); especially "to vaunt or boast" (1530s), in this use probably from or influenced by blaze (v.2).
emblazon (v.): "inscribe conspicuously," also "extol," 1590s, from assimilated form of en- (1) + blazon. Related: Emblazoned; emblazoning.
kazoo (n.): 1884, American English, probably altered from earlier bazoo "trumpet" (1877); probably ultimately imitative (compare bazooka). In England, formerly called a Timmy Talker, in France, a mirliton.
Kazoos, the great musical wonder, ... anyone can play it; imitates fowls, animals, bagpipes, etc. [1895 Montgomery Ward catalogue, p.245]
But mostly "etc."
Occam's razor: when two competing hypotheses explain the data equally well, choose the simpler. Or, as Sir William Hamilton puts it, "Neither more, nor more onerous, causes are to be assumed, than are necessary to account for the phenomena." Named for English philosopher William of Ockham or Occam (c. 1285-c. 1349), who expressed it with Entia non sunt multiplicanda praeter ncccssitatem.
So called after William of Occam (died about 1349): but, as a historical fact, Occam does not make much use of this principle, which belongs rather to the contemporary nominalist William Durand de St. Pourçain (died 1332). [Century Dictionary]
razor (n.): late 13c., from Old French raseor "a razor" (12c.), from raser "to scrape, shave" (see rase). Razor clam (1835, American English) so called because its shell resembles an old folding straight-razor. Razor-edge figurative of sharpness or a fine surface from 1680s.
razorback (n.): type of pig with a sharp ridge-like back, 1849, from razor (n.) + back (n.). Especially of feral hogs in the U.S. South. Also used of narrow ridges of land.
bazoom: "A woman’s breast", 1950s: probably an alteration of bosom.
wazoo: "A person’s buttocks or anus", 1960s: of unknown origin.