INGENUOUS

adj. 1 naïve, simple, innocent, unsophisticated, childlike, suggestible, artless, sincere, genuine, trusting, guileless, natural, straight, uncomplicated, (fair and) square, honest, fair, just, open, undeceitful, unaffected, undeceptive, undissembling, unfeigning, (open and) above-board, Colloq on the level What ideas have you been implanting into the mind of this ingenuous young girl? 2 frank, candid, open, trustworthy, honourable, forthright, direct, straightforward, four-square, honest, outspoken, blunt, bluff, bold, unreserved, free, uninhibited, unabashed: I shall be ingenuous enough to confess that what you heard about me is true