| 1 | Old Saxon | so | so, like that, in that manner |
| 2 | Proto-West Germanic | swā | so, thus, in this manner; like, similar to; just... |
| 3 | Proto-Germanic | swa | so, thus, in this manner |
| 4 | Proto-Germanic | swē | like, similar to; just like, in the same manner... |
| 5 | Proto-Indo-European | swē | — |