ingenuous

adj. 纯朴的，单纯的

infra dig, infra-, infra-red, infraction, infrared, infrastructure, infrequency, infrequent, infrequently, infringe, infringement, infuriate, infuriating, infuriatingly, infuse, infusion, ingenious, ingeniously, ingenue, ingenuity, ingenuously, ingenuousness, ingest, ingle-nook, inglorious, ingloriously, ingoing, ingot, ingrain, ingrained, ingrate, ingratiate, ingratiating, ingratiatingly, ingratiation, ingratitude, ingredient, ingress, ingrowing, inhabit,