in English is:

mortification

Mutations

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

Use

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