in English is:

catarrh

Mutations

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

Use

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