in English is:

frustration

Mutations

Soft:rwystredigaeth
Nasal:(no mutation)
Aspirate:(no mutation)

Use

y rhwystredigaeth hon
fy rhwystredigaeth i
dy rwystredigaeth di
ei rwystredigaeth ef/o
ei rhwystredigaeth hi
ein rhwystredigaeth ni
eich rhwystredigaeth chi
eu rhwystredigaeth nhw/hwy
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