1. in a recklessly bold or daring manner; without proper caution or regard for danger

Examples

• He foolhardily drove his car at high speed through the storm.
• She foolhardily agreed to the dangerous stunt without thinking of the consequences.
• The explorer foolhardily ventured into the uncharted territory without proper supplies.
• They foolhardily ignored the warning signs and entered the restricted area.
• He foolhardily challenged the much stronger opponent to a fight.
• The climber foolhardily attempted the mountain without adequate equipment.