1. Recklessly bold or daring; lacking proper caution or judgment; willing to take unnecessary risks.

Examples

• It was foolhardy to drive so fast in the rain without proper visibility.
• The foolhardy explorer ventured into the jungle without any supplies or backup plan.
• Jumping off the cliff into unknown water would be a foolhardy stunt.
• His foolhardy decision to invest all his savings in one company cost him dearly.
• The foolhardy teenager ignored the warning signs and went swimming during the storm.
• Starting a business without any market research seemed foolhardy to her advisors.