fleshyoudaoicibaDictYouDict[flesh 词源字典]
flesh: [OE] The etymological notion underlying flesh, and its near relative flitch ‘side of bacon’ [OE], is of ‘slitting open and cutting up an animal’s carcase for food’. It, together with its continental cousins, German fleisch and Dutch vleesch ‘flesh’ and Swedish fläsk ‘bacon’, comes ultimately from Indo-European *pel- ‘split’. Consequently, the earliest recorded sense of the Old English word flǣsc is ‘meat’; the broader ‘soft animal tissue’, not necessarily considered as food, seems to have developed in the late Old English period.
=> flitch[flesh etymology, flesh origin, 英语词源]
flesh (n.)youdaoicibaDictYouDict
Old English flæsc "flesh, meat, muscular parts of animal bodies; body (as opposed to soul)," also "living creatures," also "near kindred" (a sense now obsolete except in phrase flesh and blood), common West and North Germanic (compare Old Frisian flesk, Middle Low German vlees, German Fleisch "flesh," Old Norse flesk "pork, bacon"), which is of uncertain origin; according to Watkins, perhaps from Proto-Germanic *flaiskjan "piece of meat torn off," from PIE *pleik- "to tear."

Of fruits from 1570s. Figurative use for "carnal nature, animal or physical nature of man" (Old English) is from the Bible, especially Paul's use of Greek sarx, and this led to sense of "sensual appetites" (c. 1200).

Flesh-wound is from 1670s; flesh-color, the hue of "Caucasian" skin, is first recorded 1610s, described as a tint composed of "a light pink with a little yellow" [O'Neill, "Dyeing," 1862]. In the flesh "in a bodily form" (1650s) originally was of Jesus (Wyclif has up the flesh, Tindale after the flesh). An Old English poetry-word for "body" was flæsc-hama, literally "flesh-home." A religious tract from 1548 has fleshling "a sensual person." Flesh-company (1520s) was an old term for "sexual intercourse."
flesh (v.)youdaoicibaDictYouDict
1520s, "to render (a hunting animal) eager for prey by rewarding it with flesh from a kill," with figurative extensions, from flesh (n.). Meaning "to clothe or embody with flesh," with figurative extensions, is from 1660s. Related: Fleshed; fleshing.