in English is:

biodegradability

Mutations

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

Use

y bioddiraddadwyedd hwn
fy mioddiraddadwyedd i
dy fioddiraddadwyedd di
ei fioddiraddadwyedd ef/o
ei bioddiraddadwyedd hi
ein bioddiraddadwyedd ni
eich bioddiraddadwyedd chi
eu bioddiraddadwyedd nhw/hwy
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