Etymology

mordacious

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Today it means: Biting, causing a physical bite or sting; corrosive Full definition →

Latin mordax
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The story

  1. Latin · derived frommordax“given to biting, corrosive”
  2. English todaymordacious

From Latin mordax (“given to biting, corrosive”) (from mordere (“to bite, sting”)) + -ious.

Etymology from Wiktionary, CC BY-SA 4.0.