- temerity (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").