Where does “tri” come from?
tri (Welsh) comes from Proto-Brythonic tri, from Proto-Celtic trīs, from Proto-Indo-European *tréyes.
tri (Welsh): three
Ancestry of “tri”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Proto-Brythonic | tri | three |
| 2 | Proto-Celtic | trīs | three |
| 3 | Proto-Indo-European | *tréyes | — |