| 1 | Middle English | fence | — |
| 2 | Middle English | defence | — |
| 3 | Old French | defens | — |
| 4 | Late Latin | defensa | protection; bounded, defended; defence |
| 5 | Latin | defensus | driven away, having been driven away; defended,... |
| 6 | Latin | dēfendō | — |
| 7 | Latin | dē- | — |
| 8 | Latin | dē | — |
| 9 | Latin | post | behind; after, since, besides, except; behind,... |
| 10 | Latin | poste | ablative singular of postis |
| 11 | Proto-Italic | posti | — |
| 12 | Proto-Indo-European | pósti | — |
| 13 | Proto-Indo-European | pós | afterwards, post; by, at |