to grow dark
"duo" means "to grow dark" in Welsh (verb). Pronounced /ˈdɨː.ɔ/. Mutation forms: Treiglad Meddal → dduo, Treiglad Trwynol → nuo.
In Welsh, the first letter of "duo" changes depending on the grammatical context. These are the mutated forms:
| Mutation | Form |
|---|---|
| Base form | duo |
| Treiglad Meddal | dduo |
| Treiglad Trwynol | nuo |
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