sever (v.)youdaoicibaDictYouDict[sever 词源字典]
c. 1300, from Anglo-French severer, Old French sevrer "to separate" (12c., later in French restricted to "to wean," i.e. "to separare from the mother"), from Vulgar Latin *seperare, from Latin separare "to separate" (see separate (v.)).[sever etymology, sever origin, 英语词源]