exultant (adj.)youdaoicibaDictYouDict[exultant 词源字典]
1650s, from Latin exultantem/exsultantem (nominative exultans/exsultans) "boastful, vainglorious," present participle of exultare/exsultare (see exult). Related: Exultantly.[exultant etymology, exultant origin, 英语词源]