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From Middle English plucken, plukken, plockien, from Old English pluccian, ploccian (“to pluck, pull away, tear”), also Old English plyċċan ("to pluck, pull, snatch; pluck with desire"), from Proto-West Germanic *plukkōn, from Proto-Germanic *plukkōną, *plukkijaną (“to pluck”), of uncertain and disputed origin. Perhaps related to Old English pullian (“to pull, draw; pluck off; snatch”). Cognate with Saterland Frisian plukje (“to pluck”), West Frisian plôkje (“to pick, pluck”), Dutch plukken (“to pluck”), Limburgish plógte (“to pluck”), Low German plukken (“to pluck”), German pflücken (“to pluck, pick”), Danish and Norwegian plukke (“to pick”), Swedish plocka (“to pick, pluck, cull”), Icelandic plokka, plukka (“to pluck, pull”). More at pull. An alternative etymology suggests Proto-Germanic *plukkōną, *plukkijaną may have been borrowed from an assumed Vulgar Latin *pilūc(i)cāre, a derivative of Latin pilāre (“deprive of hair, make bald, depilate”), from pilus (“hair”). The Oxford English Dictionary, however, finds difficulties with this and cites gaps in historical evidence. The noun sense of "heart, liver, and lights of an animal" comes from it being plucked out of the carcass after the animal is killed; the sense of "fortitude, boldness" derives from this meaning, originally being a boxing slang denoting a prize-ring, with semantic development from "heart", the symbol of courage, to "fortitude, boldness".