in English is:

rocking

Mutations

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

Use

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