in English is:

croup

Mutations

Soft:grygwst
Nasal:nghrygwst
Aspirate:chrygwst

Use

y crygwst hwn
fy nghrygwst i
dy grygwst di
ei grygwst ef/o
ei chrygwst hi
ein crygwst ni
eich crygwst chi
eu crygwst nhw/hwy
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