foolhardy
adjective
[ ˈfuːlhɑːdi ]
• recklessly bold or rash.
• "it would be foolhardy to go into the scheme without support"
Similar:
reckless,
rash,
incautious,
careless,
heedless,
unheeding,
thoughtless,
unwise,
imprudent,
irresponsible,
injudicious,
impulsive,
hot-headed,
impetuous,
daredevil,
devil-may-care,
death-or-glory,
madcap,
hare-brained,
precipitate,
precipitous,
desperate,
hasty,
overhasty,
over-adventurous,
over-venturesome,
temerarious,
Origin:
Middle English: from Old French folhardi, from fol ‘foolish’ + hardi ‘bold’ (see hardy).