in English is:

overuse

Mutations

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

Use

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