inhuman (adj.)youdaoicibaDictYouDict[inhuman 词源字典]
mid-15c., "cruel," from Latin inhumanus "inhuman, savage, cruel, rude, barbarous," from in- "not, opposite of" (see in- (1)) + humanus "human" (see human). Spelled inhumane till 18c. (see humane).[inhuman etymology, inhuman origin, 英语词源]