to refine
"coethi" means "to refine" in Welsh (verb). Pronounced /ˈkɔɨ̯θɪ/. Mutation forms: Treiglad Meddal → goethi, Treiglad Trwynol → nghoethi, Treiglad Llaes → choethi.
In Welsh, the first letter of "coethi" changes depending on the grammatical context. These are the mutated forms:
| Mutation | Form |
|---|---|
| Base form | coethi |
| Treiglad Meddal | goethi |
| Treiglad Trwynol | nghoethi |
| Treiglad Llaes | choethi |
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