The story
- Proto-Indo-European*h₁én
- Proto-Indo-European*h₁n̥tér
- Proto-Italic*n̥ter
- Latininter
- Latininter-
- Englishinter-
- Proto-Indo-European*(s)kelH-
- Proto-Indo-European*skol-yeh₂
- Proto-Germanic*skaljō
- Proto-West Germanic*skallju
- Old Englishsċiell
- Middle Englishschelle
- Englishshell
- English todayintershell
Etymology from Wiktionary, CC BY-SA 4.0.