The story
- Proto-Indo-European*h₁ep-
- Proto-Indo-European*h₁éps
- Proto-Indo-European*h₁épi
- Proto-Indo-European*h₁pi
- Proto-Germanic*bi
- Proto-West Germanic*bī
- Old Englishbī
- Middle Englishby
- Englishby
- Englishgone
- English todaybygone
Etymology from Wiktionary, CC BY-SA 4.0.