in English is:

good will

Mutations

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

Use

yr ewyllysgarwch hwn
fy ewyllysgarwch i
dy ewyllysgarwch di
ei ewyllysgarwch ef/o
ei hewyllysgarwch hi
ein hewyllysgarwch ni
eich ewyllysgarwch chi
eu hewyllysgarwch nhw/hwy
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