in English is:

high treason

Mutations

Soft:deyrnfradwriaeth
Nasal:nheyrnfradwriaeth
Aspirate:theyrnfradwriaeth

Use

y deyrnfradwriaeth hon
fy nheyrnfradwriaeth i
dy deyrnfradwriaeth di
ei deyrnfradwriaeth ef/o
ei theyrnfradwriaeth hi
ein teyrnfradwriaeth ni
eich teyrnfradwriaeth chi
eu teyrnfradwriaeth nhw/hwy
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