in English is:

barrow

,

tumulus

Mutations

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

Use

y gwyddgrug hwn
fy ngwyddgrug i
dy wyddgrug di
ei wyddgrug ef/o
ei gwyddgrug hi
ein gwyddgrug ni
eich gwyddgrug chi
eu gwyddgrug nhw/hwy
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