isthmus
"culdir" means "isthmus" in Welsh (masculine noun). Pronounced /ˈkɨ̞ldɪr/. Mutation forms: Treiglad Meddal → guldir, Treiglad Trwynol → nghuldir, Treiglad Llaes → chuldir.
In Welsh, the first letter of "culdir" changes depending on the grammatical context. These are the mutated forms:
| Mutation | Form |
|---|---|
| Base form | culdir |
| Treiglad Meddal | guldir |
| Treiglad Trwynol | nghuldir |
| Treiglad Llaes | chuldir |
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