in English is:

dichotomy

Mutations

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

Use

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