abortive, bootless, counterproductive, disadvantageous, dysfunctional, brainless, dazed, deficient, dense, dim, doltish, dopey, dull, dumb, dummy*, foolish, futile, gullible, half-baked, half-witted, idiotic, ill-advised, imbecilic, inane, indiscreet, insensate, irrelevant, laughable, loser*, ludicrous, meaningless, mindless, moronic, naive, nonsensical, obtuse, out to lunch, pointless, puerile, rash, senseless, shortsighted, simple, simpleminded, slow, sluggish, stolid, stupefied, thick, thick-headed, trivial, unintelligent, unthinking, witlessexpendable, feckless, fruitless, futile, good-for-nothing, hopeless, idle, impracticable, impractical, incompetent, ineffective, ineffectual, inept, inoperative, inutile, meaningless, no good, nonfunctional, of no use, pointless, profitless, purposeless, scrap, stupid*, unavailable, unavailing, unfunctional, unproductive, unprofitable, unpurposed, unusuable, unworkable, vain, valueless.