(a.) Lacking wisdom or good judgment\; wanting in discretion.

audacious blanket bold brash brazen brazenfaced careless casual foolhardy foolish general hasty heedless hubristic ill-advised ill-considered ill-contrived ill-devised ill-gauged ill-judged impetuous impolitic improper improvident imprudent impudent impulsive inadvisable inappropriate incautious inconsiderate indecent indecorous indelicate indiscriminate indiscriminative inelegant inexpedient injudicious insensate insensitive insolent irrational mindless misadvised misguided myopic naive nonjudgmental overbold overcareless overconfident oversure overweening promiscuous rash reasonless reckless senseless shortsighted tactless temerarious thoughtless unadvised unbecoming unchary unconsidered uncritical uncriticizing undemanding undifferentiating undiplomatic undiscerning undiscreet undiscriminating undiscriminative unexacting unfastidious unforeseeing unmeticulous unparticular unreasonable unreflecting unreflective unseeing unseemly unselective unsensible unsound unsubtle untactful unthinking unthoughtful unwary unwise wholesale witless