The story
- Old English · inherited fromrengwyrm“maw-worm, intestinal worm”
- Middle English · inherited fromringworm“ringworm; intestinal worm”
- English todayringworm
From Middle English ringworm (“ringworm; intestinal worm”), from Old English rengwyrm (“maw-worm, intestinal worm”), equivalent to ring + worm.
Etymology from Wiktionary, CC BY-SA 4.0.