in English is:

hardboard

Mutations

Soft:galedfwrdd
Nasal:nghaledfwrdd
Aspirate:chaledfwrdd

Use

y caledfwrdd hwn
fy nghaledfwrdd i
dy galedfwrdd di
ei galedfwrdd ef/o
ei chaledfwrdd hi
ein caledfwrdd ni
eich caledfwrdd chi
eu caledfwrdd nhw/hwy
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