in English is:

fluidity

Mutations

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

Use

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