Ingenuous

прилагательное 1) открытый, прямой, искренний, откровенный Синоним(ы): candid, frank, straightforward 2) бесхитростный, простодушный, простой, наивный Синоним(ы): artless, natural

Большой англо-русский словарь

Ingenuous

I. adjective Etymology: by alteration obsolete ingenious II. adjective Etymology: Latin ingenuus native, freeborn, from in- + gignere to beget — more at kin 1. obsolete noble, honorable 2. a. showing innocent or childlike simplicity and candidness Example: her ingenuous thirst for experience — Christopher Rawson b. lacking craft or subtlety Example: ingenuous in their brutality Synonyms: see naturalingenuously adverbingenuousness noun

Merriam-Webster's Collegiate Dictionary