in English is:

diastrophism

Mutations

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

Use

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