Synonyms and related words :
awkward, blank, callow, calm, dumb, empty, empty-headed, fatuous, gauche, green, groping, ignorant, inane, incogitant, inexperienced, innocent, know-nothing, naive, nescient, nirvanic, oblivious, passive, quietistic, raw, relaxed, simple, strange to, tentative, thoughtfree, thoughtless, tranquil, unacquainted, unapprized, uncomprehending, unconversant, unenlightened, unfamiliar, unideaed, unilluminated, uninformed, uninitiated, unintellectual, unintelligent, unknowing, unoccupied, unposted, unreasoning, unripe, unsure, unthinking, unversed, vacant, vacuous