violent (adj.)youdaoicibaDictYouDict[violent 词源字典]
mid-14c., from Old French violent or directly from Latin violentus, related to violare (see violation). In Middle English the word also was applied in reference to heat, sunlight, smoke, etc., with the sense "having some quality so strongly as to produce a powerful effect." Related: Violently.[violent etymology, violent origin, 英语词源]