in English is:

deism

Mutations

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

Use

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