in English is:

boast

Mutations

Soft:fost
Nasal:most
Aspirate:(no mutation)

Use

y fost hon
fy most i
dy fost di
ei fost ef/o
ei bost hi
ein bost ni
eich bost chi
eu bost nhw/hwy
Phrases (2)
bost a chelwydd nid deupeth ydynt
mawr ei fost, bach ei orchest
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