in English is:

pietism

Mutations

Soft:bietistiaeth
Nasal:mhietistiaeth
Aspirate:phietistiaeth

Use

y bietistiaeth hon
fy mhietistiaeth i
dy bietistiaeth di
ei bietistiaeth ef/o
ei phietistiaeth hi
ein pietistiaeth ni
eich pietistiaeth chi
eu pietistiaeth nhw/hwy
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