The story
- Proto-Indo-European*bʰeg-der.?
- Proto-Germanic*baką
- Proto-West Germanic*bak
- Old Englishbæc
- Middle Englishbak
- Englishback
- Proto-Germanic*handuz
- Proto-West Germanic*handu
- Old Englishhand
- Middle Englishhond
- Englishhand
- English todaybackhand
Etymology from Wiktionary, CC BY-SA 4.0.