in English is:

decomposition

Mutations

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

Use

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