quench (v.)youdaoicibaDictYouDict[quench 词源字典]
Old English acwencan "to quench" (of fire, light), from Proto-Germanic *kwankjan, probably a causative form of root of Old English cwincan "to go out, be extinguished," Old Frisian kwinka. Related: Quenched; quenching.[quench etymology, quench origin, 英语词源]