Etymology
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tenebrous (adj.)

"full of darkness," late 15c., from Old French tenebros "dark, gloomy" (11c., Modern French ténébreux), from Latin tenebrosus "dark," from tenebrae "darkness," dissimilated from earlier *temebrai, from Proto-Italic *temasra- "darkness," from PIE root *temsro- "dark" (adj.), for which see temerity. Related: Tenebrosity.

updated on December 12, 2021

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