absurd, aimless, airy, apish, arid, asinine, awkward, bare, barren, batty, befooled, beguiled, besotted, blah, bland, blank, blankminded, bleached, bloodless, bonkers, bootless, brainless, buffoonish, callow, calm, catchpenny, characterless, clear, cockeyed, cold, colorless, counterproductive, crazy, credulous, cuckoo, daffy, daft, dazed, dead, designless, devoid, dilute, diluted, dippy, doting, dotty, draggy, drearisome, dreary, driveling, dry, dryasdust, dull, dumb, dusty, effete, elephantine, empty-headed, empty-minded, empty-pated, empty-skulled, empty, etiolated, fade, fatuitous, fatuous, featureless, feckless, flaky, flat, flavorless, flimsy, fond, fool, foolheaded, foolish, fribble, fribbling, frivolous, frothy, fruitless, fuddled, futile, gaga, garbled, gauche, goofy, green, groping, gruelly, gulled, heavy, ho-hum, hollow, idiotic, idle, ignorant, imbecile, imbecilic, importless, inadequate, incogitant, indifferent, ineffective, ineffectual, inefficacious, inept, inexcitable, inexperienced, infatuated, innocent, innocuous, inoperative, insane, insignificant, insipid, invalid, jejune, know-nothing, kooky, laughable, leaden, lifeless, light, loony, low-spirited, ludicrous, lunatic, mad, maudlin, meaningless, mild, milk-and-water, moronic, naive, namby-pamby, nescient, nirvanic, nonconnotative, nondenotative, nonsensical, nugacious, nugatory, null, null and void, nuts, nutty, oblivious, of no force, otiose, pale, pallid, pappy, passive, pedestrian, phatic, plodding, pointless, poky, ponderous, preposterous, pulpy, purportless, purposeless, quietistic, rattlebrained, rattleheaded, raw, relaxed, ridiculous, risible, sapless, sappy, savorless, scatterbrained, scrambled, screwy, senseless, sentimental, shallow, silly, simple, slender, slight, slow, solemn, spiceless, spiritless, stale, sterile, stiff, stodgy, strange to, stuffy, stupid, superficial, tasteless, tedious, tentative, thin, thoughtfree, thoughtless, tranquil, trifling, trite, trivial, unacquainted, unapprized, unavailing, uncomprehending, unconversant, unenlightened, unfamiliar, unflavored, unideaed, unilluminated, uninformed, uninitiated, unintellectual, unintelligent, unknowing, unlively, unmeaning, unoccupied, unposted, unreasonable, unreasoning, unrelieved, unripe, unsavory, unsignificant, unsure, unthinking, unversed, useless, vacant, vacuous, vain, vapid, void, wacky, washy, watered-down, watered, watery, weak, wet, white, windy, wishy-washy, with nothing inside, without content, witless, wooden