in English is:

compatibility

Mutations

Soft:gydweddoldeb
Nasal:nghydweddoldeb
Aspirate:chydweddoldeb

Use

y cydweddoldeb hwn
fy nghydweddoldeb i
dy gydweddoldeb di
ei gydweddoldeb ef/o
ei chydweddoldeb hi
ein cydweddoldeb ni
eich cydweddoldeb chi
eu cydweddoldeb nhw/hwy
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