The quality of being foolishly bold or reckless; lack of proper caution combined with daring or courage.
Foolhardy plus the suffix '-ness' (from Old English, forming abstract nouns). This common nominalization emerged as English speakers formalized the quality of foolish boldness.
Foolhardiness is psychologically interesting—it describes a real cognitive bias where confidence in your own abilities overrides rational fear, which is why overconfident teens and ambitious explorers often share this quality.
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