in English is:

co-dominance

Mutations

Soft:gyd-drechedd
Nasal:nghyd-drechedd
Aspirate:chyd-drechedd

Use

y cyd-drechedd hwn
fy nghyd-drechedd i
dy gyd-drechedd di
ei gyd-drechedd ef/o
ei chyd-drechedd hi
ein cyd-drechedd ni
eich cyd-drechedd chi
eu cyd-drechedd nhw/hwy
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