The story
- Proto-Indo-European*(s)kelH-
- Proto-Indo-European*skol-yeh₂
- Proto-Germanic*skaljō
- Proto-West Germanic*skallju
- Old Englishsċiell
- Middle Englishschelle
- Englishshell
- Proto-Indo-European*lewh₁-
- Proto-Indo-European*lewHs-
- Proto-Germanic*leusaną
- Proto-Germanic*lausaz
- English todayshell-less
Etymology from Wiktionary, CC BY-SA 4.0.