Synonyms and related words :
arbitrary, capricious, careless, heedless, ill-advised, ill-considered, ill-contrived, ill-devised, ill-gauged, ill-judged, impolitic, imprudent, inadvertent, inadvisable, inconsiderate, indiscreet, inexpedient, injudicious, insensate, irrational, mindless, misadvised, misguided, myopic, reasonless, reckless, senseless, shortsighted, thoughtless, unadvised, uncalculating, unconsidered, undiscerning, unforeseeing, unguarded, unreasonable, unreasoning, unreflective, unseeing, unsensible, unsound, unthinking, unthoughtful, unwise, witless