NESCIENT Meaning of NESCIENT in English [ 'nɛsɪənt ]■ adjective literary lacking knowledge; ignorant.Derivativesnescience noun OriginME: from L. ~- , nescire 'to not know', from ne- 'not' + scire 'know'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004