impious (adj.)youdaoicibaDictYouDict[impious 词源字典]
1590s, from Latin impius "without reverence, irreverent, wicked; undutiful, unpatriotic," from assimilated form of in- "not, opposite of" (see in- (1)) + pius (see pious). Related: Impiously; impiousness.[impious etymology, impious origin, 英语词源]