foolhardy
Definitions
Recklessly bold or rash.
Foolishly adventurous or daring.
Examples
It was foolhardy to attempt the mountain climb during such a severe thunderstorm.
The young knight's foolhardy decision to charge the enemy alone resulted in his swift defeat.
Investing all of your savings into a single unproven startup is a foolhardy risk.
Synonyms
Antonyms
cautious prudent careful circumspect wary thoughtful deliberate