in English is:

opacity

Mutations

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

Use

y didreiddedd hwn
fy nidreiddedd i
dy ddidreiddedd di
ei ddidreiddedd ef/o
ei didreiddedd hi
ein didreiddedd ni
eich didreiddedd chi
eu didreiddedd nhw/hwy
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