Middle English word bough comes from Proto-Indo-European *bʰāǵʰus, Proto-Indo-European *bʰeh₂ǵʰus (Arm.), Proto-Indo-European *bʰug-
| Dictionary entry | Language | Definition |
|---|---|---|
| *bʰāǵʰus | Proto-Indo-European (ine-pro) | |
| *bʰeh₂ǵʰus | Proto-Indo-European (ine-pro) | Arm. |
| *bʰug- | Proto-Indo-European (ine-pro) | |
| *beuganą | Proto-Germanic (gem-pro) | To bend, bow. |
| *bʰugʰ- | Proto-Indo-European (ine-pro) | |
| *bōguz | Proto-Germanic (gem-pro) | Upper arm, shoulder. |
| bōh | Old English (ang) | |
| *bugô | Proto-Germanic (gem-pro) | A bow. |
| boga | Old English (ang) | Something bent or curved, especially a bow. |
| boȝ | Middle English (enm) |