temerity

noun

1. reckless boldness; rashness.

noun

1. rashness or boldness

n.early 15c., from Middle French témérité (15c.), from Latin temeritatem (nominative temeritas) “blind chance, accident, rashness,” from temere “by chance, blindly, casually, rashly,” related to tenebrae “darkness,” from PIE root *temes- “dark” (cf. Sanskrit tamas- “darkness,” tamsrah “dark;” Avestan temah “darkness;” Lithuanian tamsa “darkness,” tamsus “dark;” Old Church Slavonic tima “darkness;” Old High German dinstar “dark;” Old Irish temel “darkness”).