in English is:

institutionalism

Mutations

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

Use

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