| 1 | Norwegian Bokmål | Bø | — |
| 2 | Danish | Bo | — |
| 3 | Old Norse | búi | dweller, inhabitant; neighbour; a neighbour... |
| 4 | Tagalog | buo | whole; entire; complete, absolute, perfect;... |
| 5 | French | bouée | — |
| 6 | Middle Dutch | boeye | life buoy; float, buoy; shackle, fetter |
| 7 | Old French | boie | bond, chain; fetter, chain, clog |
| 8 | Latin | boia | fetter, collar for the neck |
| 9 | Ancient Greek | βοείη | ox hide |
| 10 | Ancient Greek | βοῦς | cow, ox, cattle; shield: ὃτι ἐκ βοείων ἐστι... |
| 11 | Latin | corvus | A raven; a bird associated with prophecy and... |
| 12 | Proto-Italic | korwos | — |
| 13 | Proto-Indo-European | ḱorh₂wós | — |
| 14 | Proto-Indo-European | ḱer- | to grow, to make grow, to nourish; to plait,... |
| 15 | Proto-Indo-European | kr̥- | to turn, to bend |