in English is:

gradualism

Mutations

Soft:raddoliaeth
Nasal:ngraddoliaeth
Aspirate:(no mutation)

Use

y raddoliaeth hon
fy ngraddoliaeth i
dy raddoliaeth di
ei raddoliaeth ef/o
ei graddoliaeth hi
ein graddoliaeth ni
eich graddoliaeth chi
eu graddoliaeth nhw/hwy
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