Where does “dwywaith” come from?
dwywaith (Welsh) comes from Welsh dwy, from Welsh dau, from Proto-Brythonic *dow, from Proto-Celtic *duwo, from Proto-Indo-European dwóh₁ — two.
dwywaith (Welsh): twice
Ancestry of “dwywaith”, step by step
dwywaith traces back through two separate lines of ancestry.
via Welsh dwy
| Step | Language | Word | Meaning |
|---|
| 1 | Welsh | dwy | feminine of dau; two |
| 2 | Welsh | dau | two |
| 3 | Proto-Brythonic | *dow | two |
| 4 | Proto-Celtic | *duwo | two |
| 5 | Proto-Indo-European | dwóh₁ | two |
via Welsh gwaith
| Step | Language | Word | Meaning |
|---|
| 1 | Welsh | gwaith | work, labour, act, deed, task, job; aid;... |
| 2 | Middle Welsh | gweith | time, course |
| 3 | Proto-Brythonic | gweiθ | — |
| 4 | Proto-Celtic | wextā | time, course, turn |
| 5 | Proto-Indo-European | weǵʰ- | to bring; to transport |