environ (v.)youdaoicibaDictYouDict[environ 词源字典]
late 14c. (implied in environing), "to surround, encircle, encompass," from Old French environer "to surround, enclose, encircle," from environ "round about," from en- "in" (see en- (1)) + viron "a circle, circuit," also used as an adverb, from virer "to turn" (see veer). Related: Environed.[environ etymology, environ origin, 英语词源]