in English is:

complainant

Mutations

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

Use

yr achwynyddes hon
fy achwynyddes i
dy achwynyddes di
ei achwynyddes ef/o
ei hachwynyddes hi
ein hachwynyddes ni
eich achwynyddes chi
eu hachwynyddes nhw/hwy
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