in English is:

classicism

Mutations

Soft:glasuriaeth
Nasal:nghlasuriaeth
Aspirate:chlasuriaeth

Use

y glasuriaeth hon
fy nghlasuriaeth i
dy glasuriaeth di
ei glasuriaeth ef/o
ei chlasuriaeth hi
ein clasuriaeth ni
eich clasuriaeth chi
eu clasuriaeth nhw/hwy
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