Displaying disdain or contempt for danger.(adjective)
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Use "temeritous" in a sentence
"However, the experience of the saints whose apostasy would have precluded the grace of martyrdom, and while afterwards recanting, would seem to give greater glory to God, who in his mercy, accomplished that which was humanly impossible for the temeritous soul."
"Of course not, since he regularly deletes critical posts and bans those temeritous enough to come back with more of the same."