The story
- Proto-Indo-European*serp-
- Proto-Indo-European*sérpeti
- Proto-Italic*serpō
- Latinserpō
- Latinserpēns
- Old Frenchserpent
- Middle Englishserpent
- English todayserpent
From Middle English serpent, from Old French serpent (“snake, serpent”), from Latin serpēns (“snake”), present active participle of serpere (“to creep, crawl”), from Proto-Italic *serpō, from Proto-Indo-European *serp-. In this sense, displaced native Old English nǣdre (“snake, serpent”), whence Modern English adder. Compare Sanskrit सर्प (sarpa, “snake”), which is a descendant of the same Proto-Indo-European word as serpent.
Words from the same roots
Etymology from Wiktionary, CC BY-SA 4.0.