what
"beth" means "what" in Welsh (pronoun). Mutation forms: Treiglad Meddal → feth, Treiglad Trwynol → meth.
In Welsh, the first letter of "beth" changes depending on the grammatical context. These are the mutated forms:
| Mutation | Form |
|---|---|
| Base form | beth |
| Treiglad Meddal | feth |
| Treiglad Trwynol | meth |
Beth sydd fel arfer yn achosi'r boen?
What usually causes the pain?
B1"Beth yw enw dy wraig?" "Dydw i ddim yn briod."
"What's your wife's name?" "I'm not married."
A2Gwna beth sy'n iawn.
Do what is right.
A2Tybed beth ddigwyddodd iddo?
I wonder what happened to him.
A2Tybed beth ddigwyddodd?
I wonder what happened.
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