Where does “dy-” come from?
dy- (Welsh) comes from Proto-Celtic dus-, from Proto-Indo-European dus-, from Proto-Indo-European dēwǝ- — to fail, be behind, be lacking.
dy- (Welsh): bad; to, together
Ancestry of “dy-”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Proto-Celtic | dus- | bad |
| 2 | Proto-Indo-European | dus- | bad |
| 3 | Proto-Indo-European | dēwǝ- | to fail, be behind, be lacking |