deduction
"diddwythiad" means "deduction" in Welsh (masculine noun). Mutation forms: Treiglad Meddal → ddiddwythiad, Treiglad Trwynol → niddwythiad.
In Welsh, the first letter of "diddwythiad" changes depending on the grammatical context. These are the mutated forms:
| Mutation | Form |
|---|---|
| Base form | diddwythiad |
| Treiglad Meddal | ddiddwythiad |
| Treiglad Trwynol | niddwythiad |
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