NAÏVE

adj. naive or naïf, ingenuous, innocent, credulous, childlike, born yesterday, unaffected, unsophisticated, inexperienced, green, unworldly, unsuspecting, unenlightened, unsuspicious, trusting, trustful, gullible, artless, guileless, simple, simplistic, simple-minded, unpretentious, unpretending, candid, natural: Is Chatterley naïve enough to believe that the gamekeeper's meetings with his wife were to discuss fox-hunting?