in English is:

inflexibility

,

stiffness

Mutations

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

Use

yr anystwythder hwn
fy anystwythder i
dy anystwythder di
ei anystwythder ef/o
ei hanystwythder hi
ein hanystwythder ni
eich anystwythder chi
eu hanystwythder nhw/hwy
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