in English is:

simpleton

Mutations

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

Use

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