rash abrupt brash careless hasty impetuous imprudent impulsive injudicious precipitant precipitous reckless thoughtless audacious casual cavalier cursory foolhardy foolish immature indiscreet irrational misguided naive nonchalant perfunctory premature sloppy sudden uncalculated unconsidered unwise impromptu irresponsible negligent spontaneous unreasoned unwary heedless hurried rushed stupid unadvised unplanned unstudied wild unintentional accidental unpremeditated unthinking natural overhasty incautious slapdash temerarious haphazard bold precipitate improvident misjudged headlong ignorant inconsiderate uninformed inadvertent unwitting silly idiotic dumb inane outrageous simpleminded unsound farcical mindless trivial doltish frivolous inept senseless asinine inconsiderable nonsensical thickheaded unintelligent fatuous imbecilic inconsequential inexpedient unreasonable dippy feebleminded gormless harebrained implausible unimportant daft illogical inadvisable ridiculous