in English is:

connection

,

relationship

Mutations

Soft:berthynas
Nasal:mherthynas
Aspirate:pherthynas

Use

y berthynas hon
fy mherthynas i
dy berthynas di
ei berthynas ef/o
ei pherthynas hi
ein perthynas ni
eich perthynas chi
eu perthynas nhw/hwy
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