Middle English word bon comes from Proto-Indo-European *bʰoyd-, Proto-Indo-European *bʰoyh₂-, and later Proto-Germanic *bainaz (Ready, willing. Straight, right.)
| Dictionary entry | Language | Definition |
|---|---|---|
| *bʰoyd- | Proto-Indo-European (ine-pro) | |
| *bʰoyh₂- | Proto-Indo-European (ine-pro) | to be frightened |
| *bainaz | Proto-Germanic (gem-pro) | Ready, willing. Straight, right. |
| *bainą | Proto-Germanic (gem-pro) | Leg, bone. |
| bān | Old English (ang) | |
| bon | Middle English (enm) | Bone. |