in English is:

firmament

Mutations

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

Use

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