in English is:

additionality

Mutations

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

Use

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