in English is:

abatement

Mutations

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

Use

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