The story
- Proto-Indo-European*bʰeg-der.?
- Proto-Germanic*baką
- Proto-West Germanic*bak
- Old Englishbæc
- Middle Englishbak
- Englishback
- Proto-Indo-European*h₂ent-
- Proto-Indo-European*h₂entíos
- Proto-Germanic*andijaz
- Proto-West Germanic*andī
- Old Englishende
- Middle Englishende
- Englishend
- English todaybackend
Etymology from Wiktionary, CC BY-SA 4.0.