The story
- Late Latin · derived fromcatta
- Old Northern French · derived fromcatepeluse
- Middle English · inherited fromcatirpel
- English todaycaterpillar
From Middle English catirpel, catirpeller, probably from Old Northern French catepeluse (Modern French chatte + pileuse (“hairy cat”)), from Late Latin catta + pilōsa. The sense "rapacious, extortionate person" arose by association with obsolete piller (“plunderer”). See Modern Norman cattepeleuse. Displaced native kaleworm, from Middle English cowle worm, cale worme (“caterpillar, corn weevil”), from Old English cawelwyrm, cawelwurm (“caterpillar”).
Etymology from Wiktionary, CC BY-SA 4.0.