The story
- Proto-Indo-European*sap-
- Proto-West Germanic*sap
- Old Englishsæp
- Middle Englishsap
- Englishsap
- Proto-Indo-European*lewh₁-
- Proto-Indo-European*lewHs-
- Proto-Germanic*leusaną
- Proto-Germanic*lausaz
- English todaysapless
Etymology from Wiktionary, CC BY-SA 4.0.