a long time
"achau" means "a long time" in Welsh (feminine noun). Mutation forms: Treiglad Llaes → hachau.
In Welsh, the first letter of "achau" changes depending on the grammatical context. These are the mutated forms:
| Mutation | Form |
|---|---|
| Base form | achau |
| Treiglad Llaes | hachau |
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