in English is:

fellow travellers

Mutations

Soft:gydymdeithion
Nasal:nghydymdeithion
Aspirate:chydymdeithion

Use

y cydymdeithion hyn
fy nghydymdeithion i
dy gydymdeithion di
ei gydymdeithion ef/o
ei chydymdeithion hi
ein cydymdeithion ni
eich cydymdeithion chi
eu cydymdeithion nhw/hwy
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