in English is:

interpenetration

Mutations

Soft:gydymdreiddiad
Nasal:nghydymdreiddiad
Aspirate:chydymdreiddiad

Use

y cydymdreiddiad hwn
fy nghydymdreiddiad i
dy gydymdreiddiad di
ei gydymdreiddiad ef/o
ei chydymdreiddiad hi
ein cydymdreiddiad ni
eich cydymdreiddiad chi
eu cydymdreiddiad nhw/hwy
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