unsuspicious

lacking in worldly wisdom or informed judgment a happy-go-lucky, unsuspicious fellow who was easy prey for confidence men Synonyms aw-shucks, dewy, dewy-eyed, green, ingenuous, innocent, naïf (or naif), primitive, simple, simpleminded, uncritical, unknowing, unsophisticated, unsuspecting, naive, unwary, unworldly, wide-eyedRelated Words callow, childish, immature, inexperienced, raw; childlike, idealistic, impractical, unrealistic; believing, credulous, gullible (also gullable), susceptible, trustful, trusting, unguarded; beguiled, duped, gulled, tricked; careless, heedless, thoughtlessNear Antonyms critical, cynical, doubting, incredulous, skeptical, suspecting, suspicious, unconvinced; careful, cautious, guarded, leery (also leary), wary, watchful; down-to-earth, hardheaded, pragmatic (also pragmatical), realistic, sober; street-smart, streetwiseAntonyms cosmopolitan, experienced, knowing, sophisticated, worldly, worldly-wise