in English is:

resistance

Mutations

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

Use

y gwrthwynebedd hwn
fy ngwrthwynebedd i
dy wrthwynebedd di
ei wrthwynebedd ef/o
ei gwrthwynebedd hi
ein gwrthwynebedd ni
eich gwrthwynebedd chi
eu gwrthwynebedd nhw/hwy
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