Where does “to-” come from?
to- (Proto-Celtic) comes from Proto-Indo-European mēd-, from Proto-Indo-European med- — to measure; to give advice; healing.
to- (Proto-Celtic): to, towards
Ancestry of “to-”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Proto-Indo-European | mēd- | — |
| 2 | Proto-Indo-European | med- | to measure; to give advice; healing |