in English is:

vegetarianism

Mutations

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

Use

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