in English is:

cubism

Mutations

Soft:giwbiaeth
Nasal:nghiwbiaeth
Aspirate:chiwbiaeth

Use

y giwbiaeth hon
fy nghiwbiaeth i
dy giwbiaeth di
ei giwbiaeth ef/o
ei chiwbiaeth hi
ein ciwbiaeth ni
eich ciwbiaeth chi
eu ciwbiaeth nhw/hwy
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