INGENUOUS Meaning of INGENUOUS in English [ ɪn'dʒɛnjʊəs ]■ adjective innocent and unsuspecting.Derivatives~ly adverb~ness noun OriginC16 (orig. in sense 'noble, generous'): from L. ingenuus lit. 'native, inborn'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004