Where does “*wai” come from?
*wai (Proto-Celtic) comes from Proto-Indo-European wáy, from Proto-Indo-European uwáy — to see oneself.
Ancestry of “*wai”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Proto-Indo-European | wáy | oh!; ah!; woe! |
| 2 | Proto-Indo-European | uwáy | to see oneself |