Synonyms to not bright

ignorant, a novice at, a stranger to, awkward, benighted, blankminded, boorish, brainless, callow, crude, disaccustomed, discourteous, dumb, empty, empty-headed, foolish, fresh, gauche, green, green as grass, groping, gross, headless, ill-mannered, illiterate, immature, impolite, in the dark, inane, incognizant, inept, inexperienced, ingenuous, innocent, insensate, irrational, know-nothing, lackbrained, lean-minded, lean-witted, lowbrow, mindless, naive, nescient, new to, oblivious, of little brain, pea-brained, pin-brained, raw, reasonless, rude, rusty, senseless, simple, slackminded, slackwitted, strange to, tentative, unaccustomed, unaccustomed to, unacquainted, unacquainted with, unapprized, unaware, uncivil, uncomprehending, unconscious, unconversant, unconversant with, uncouth, uncultured, undeveloped, uneducated, unenlightened, unexperienced, unfamiliar, unfamiliar with, unfledged, ungifted, unhabituated, unhardened, unilluminated, uninformed, uninitiated, uninitiated in, uninstructed, unintellectual, unintelligent, uninured, unknowing, unlearned, unlettered, unmatured, unposted, unpr