languid (adj.)youdaoicibaDictYouDict[languid 词源字典]
1590s, from Middle French languide (16c.) and directly from Latin languidus "faint, listless," from languere "be weak or faint," from PIE root *(s)leg- "to be slack" (see lax). Related: Languidly; languidness.[languid etymology, languid origin, 英语词源]