in English is:

separation

,

secession

Mutations

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

Use

yr ymwahaniad hwn
fy ymwahaniad i
dy ymwahaniad di
ei ymwahaniad ef/o
ei hymwahaniad hi
ein hymwahaniad ni
eich ymwahaniad chi
eu hymwahaniad nhw/hwy
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