in English is:

obligingness

Mutations

Soft:wasanaethgarwch
Nasal:ngwasanaethgarwch
Aspirate:(no mutation)

Use

y gwasanaethgarwch hwn
fy ngwasanaethgarwch i
dy wasanaethgarwch di
ei wasanaethgarwch ef/o
ei gwasanaethgarwch hi
ein gwasanaethgarwch ni
eich gwasanaethgarwch chi
eu gwasanaethgarwch nhw/hwy
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