adj. 25B6; adjective RASH, careless, thoughtless, heedless, unheeding, hasty, overhasty, precipitate, precipitous, impetuous, impulsive, daredevil, devil-may-care; irresponsible, foolhardy, over-adventurous, audacious; ill-advised, injudicious, madcap, imprudent, unwise, ill-considered; poetic/literary temerarious.
careful.