villainous (adj.)youdaoicibaDictYouDict[villainous 词源字典]
c. 1300, "offensive, abusive," from Old French vileneus "worthless, base," from vilain (see villain). Sense of "despicable, shameful, morally corrupt" is from c. 1400 in English. Related: Villainously; villainousness.[villainous etymology, villainous origin, 英语词源]