The story
- Old French · derived fromvenimos
- Middle English · inherited fromvenymous
- English todayvenomous
From Middle English venymous, from Old French venimos, composed of venim (“venom”) + -os (adjective-forming suffix). Synchronically analysable as venom + -ous. Compare Modern French venimeux. Piecewise doublet of venenous.
Etymology from Wiktionary, CC BY-SA 4.0.