inanity (n.)youdaoicibaDictYouDict[inanity 词源字典]
c. 1600, "emptiness, hollowness," literal and figurative, from French inanité or directly from Latin inanitas "emptiness, empty space," figuratively "worthlessness," noun of quality from inanis "empty, void, worthless, useless," of uncertain origin.[inanity etymology, inanity origin, 英语词源]