Synonyms and related words :
bad, brainless, childish, fatuous, foolish, futile, headless, ignorant, ill-advised, ill-considered, ill-contrived, ill-devised, ill-gauged, ill-judged, ill-suited, ill-timed, immature, impolitic, impractical, improper, imprudent, inadvisable, inane, inappropriate, inapt, incongruous, inconsiderate, indiscreet, inept, inexpedient, infelicitous, injudicious, inopportune, insensate, irrational, lackbrained, lean-minded, lean-witted, mal a propos, malapropos, mindless, misadvised, misguided, myopic, naive, not bright, of little brain, out of place, pea-brained, penny-wise and pound-foolish, pin-brained, reasonless, reckless, senseless, shortsighted, slackminded, slackwitted, thoughtless, unadvised, unbefitting, unconsidered, undesirable, undiscerning, unfit, unfitting, unforeseeing, unfortunate, ungifted, unhappy, unintellectual, unintelligent, unmeet, unprofitable, unreasonable, unreasoning, unreflecting, unreflective, unseasonable, unseeing, unseemly, unsensible, unsound, unsuitable, untalented, unthinking, unthoughtful, untimely, witless, wrong