in English is:

secularism

Mutations

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

Use

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