in English is:

resistivity

Mutations

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

Use

y gwrthedd hwn
fy ngwrthedd i
dy wrthedd di
ei wrthedd ef/o
ei gwrthedd hi
ein gwrthedd ni
eich gwrthedd chi
eu gwrthedd nhw/hwy
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