vicious
"cythreulig" means "vicious" in Welsh (adjective). Mutation forms: Treiglad Meddal → gythreulig, Treiglad Trwynol → nghythreulig, Treiglad Llaes → chythreulig.
In Welsh, the first letter of "cythreulig" changes depending on the grammatical context. These are the mutated forms:
| Mutation | Form |
|---|---|
| Base form | cythreulig |
| Treiglad Meddal | gythreulig |
| Treiglad Trwynol | nghythreulig |
| Treiglad Llaes | chythreulig |
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