optativeyoudaoicibaDictYouDict[optative 词源字典]
in reference to grammatical mood expressing wish or desire, 1520s, from Middle French optatif (15c.), from Late Latin optativus, from Latin optatus "wished, desired, longed for," past participle of optare "to choose, wish, desire" (see option).[optative etymology, optative origin, 英语词源]