airy, asinine, awkward, bare, barren, bland, blank, blankminded, bleached, callow, calm, catchpenny, characterless, clear, devoid, dumb, empty-headed, empty-minded, empty-pated, empty-skulled, empty, existless, fatuous, featureless, flimsy, foolish, fribble, fribbling, frivolous, frothy, futile, gauche, green, groping, hollow, idle, ignorant, inane, incogitant, inexperienced, innocent, insipid, jejune, know-nothing, lacking, light, minus, missing, naive, negative, nescient, nirvanic, nonexistent, nugacious, nugatory, null, null and void, oblivious, otiose, passive, quietistic, rattlebrained, rattleheaded, raw, relaxed, scatterbrained, shallow, silly, simple, slender, slight, strange to, superficial, tentative, thoughtfree, thoughtless, tranquil, trifling, trite, trivial, unacquainted, unapprized, uncomprehending, unconversant, unenlightened, unexisting, unfamiliar, unideaed, unilluminated, uninformed, uninitiated, unintellectual, unintelligent, unknowing, unoccupied, unposted, unreasoning, unrelieved, unripe, unsure, unthinking, unversed, vacant, vain, vapid, void, white, windy, with nothing inside, without being, without content