in English is:

peculiarity

,

strangeness

Mutations

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

Use

y dieithrwch hwn
fy nieithrwch i
dy ddieithrwch di
ei ddieithrwch ef/o
ei dieithrwch hi
ein dieithrwch ni
eich dieithrwch chi
eu dieithrwch nhw/hwy
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