nescient (adj.)youdaoicibaDictYouDict[nescient 词源字典]
1620s, from Latin nescientem (nominative nesciens) "ignorant, unaware," present participle of nescire "not to know, to be ignorant," from ne "not" + scire "to know" (see science).[nescient etymology, nescient origin, 英语词源]