Synonyms and related words :
a stranger to, asleep, awkward, blankminded, blind to, callow, caught napping, dead to, deaf to, dumb, empty, empty-headed, gauche, green, groping, ignorant, impercipient, in ignorance of, inane, incognizant, inexperienced, innocent, insensible, insensible to, know-nothing, mindless, naive, napping, nescient, nonconceiving, not with it, out of it, raw, simple, strange to, tentative, unacquainted, unapprized, unaware, unaware of, uncomprehending, unconscious, unconscious of, unconversant, unenlightened, unfamiliar, unhearing, unilluminated, uninformed, uninitiated, uninsightful, uninstructed, unintelligent, unmindful, unmindful of, unperceiving, unposted, unprehensive, unrealizing, unripe, unseeing, unsure, unsuspecting, unversed, unwitting, vacuous, witless