adj. 25B6; adjective NAIVE, innocent, simple, childlike, trusting, trustful, over-trusting, unwary; unsuspicious, unworldly, wide-eyed, inexperienced, green; open, sincere, honest, frank, candid, forthright, artless, guileless, genuine.
artful.
INGENUOUS
Meaning of INGENUOUS in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012