| 1 | Latin | arbustum | A plantation, orchard, vineyard planted with... |
| 2 | Latin | arbustus | set or planted with trees, wooded, forested |
| 3 | Latin | arbor | a tree; something made from a tree, of wood; the... |
| 4 | Latin | arbos | Alternative form of arbor |
| 5 | Proto-Indo-European | h₃erdʰ- | to increase, grow; upright, high |
| 6 | Proto-Indo-European | -wós | Creates adjectives from verb stems |