Adjective

(en-adj)

Marked by unthinking recklessness with disregard for danger; bold but rash; hotheaded

* {{quote-book

, year=1876 , author=Mark Twain , title=The Adventures of Tom Sawyer , chapter=6 citation , passage=The master’s pulse stood still, and he stared helplessly. The buzz of study ceased. The pupils wondered if this foolhardy boy had lost his mind.}}

* 2000 . Bill Bryson, In a Sunburned Country , p. 14:

In the middle distance several foolhardy souls in wet suits were surfing toward some foamy outbursts on the rocky headland...