in English is:

federation

Mutations

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

Use

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