in English is:

common chickweed

Mutations

Soft:wlyddyn y dom
Nasal:ngwlyddyn y dom
Aspirate:(no mutation)

Use

y gwlyddyn y dom hwn
fy ngwlyddyn y dom i
dy wlyddyn y dom di
ei wlyddyn y dom ef/o
ei gwlyddyn y dom hi
ein gwlyddyn y dom ni
eich gwlyddyn y dom chi
eu gwlyddyn y dom nhw/hwy
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