in English is:

sorcery

,

witchcraft

Mutations

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

Use

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