in English is:

saponification

Mutations

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

Use

y seboneiddiad hwn
fy seboneiddiad i
dy seboneiddiad di
ei seboneiddiad ef/o
ei seboneiddiad hi
ein seboneiddiad ni
eich seboneiddiad chi
eu seboneiddiad nhw/hwy
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