**na • ive** > having or showing unaffected simplicity of nature or absence of artificiality; unsophisticated; ingenuous. _see also..._ > aboveboard, artless, callow, candid, confiding, countrified, credulous, forthright, frank, fresh, green\*, guileless, gullible, harmless, ignorant, impulsive, ingenuous, innocent, innocuous, instinctive, jejune, lamb\*, natural, open, original, patsy\*, plain, simple, simple-minded, **sincere**, spontaneous, square, sucker\*, trusting, unaffected, unjaded, unpretentious, unschooled, unsophisticated, unsuspecting, unsuspicious, untaught, unworldly, virgin, wide-eyed\*