noxiousyoudaoicibaDictYouDict[noxious 词源字典]
noxious: [17] Noxious was adapted from Latin noxius ‘harmful’, a derivative of noxa ‘damage, injury’. (An earlier borrowing was obnoxious [16], from Latin obnoxius, which contains the prefix ob- ‘to’.) Related to noxa were Latin nex ‘destruction, death, slaughter’ (source of English internecine and pernicious) and nocēre ‘injure’ (source of English innocent, innocuous, and nuisance).
=> innocent, innocuous, internecine, nuisance, obnoxious, pernicious[noxious etymology, noxious origin, 英语词源]
noxious (adj.)youdaoicibaDictYouDict
c. 1500, from Latin noxius "hurtful, injurious," from noxa "injury, hurt, damage entailing liability" (related to nocere "to hurt," and to nex "slaughter"), from PIE *nek-ro-, causative form of root *nek- (1) "death" (see necro-).