in English is:

relativism

Mutations

Soft:berthnasolaeth
Nasal:mherthnasolaeth
Aspirate:pherthnasolaeth

Use

y berthnasolaeth hon
fy mherthnasolaeth i
dy berthnasolaeth di
ei berthnasolaeth ef/o
ei pherthnasolaeth hi
ein perthnasolaeth ni
eich perthnasolaeth chi
eu perthnasolaeth nhw/hwy
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