The story
- Proto-Indo-European*h₂el-der.?
- Proto-Indo-European*h₂elnós
- Proto-Germanic*allaz
- Proto-Germanic*ala-
- Proto-West Germanic*ala-
- Old Englishæl-
- Middle Englishall-
- Englishall-
- Englishimportant
- English todayall-important
Etymology from Wiktionary, CC BY-SA 4.0.