in English is:

venation

Mutations

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

Use

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