in English is:

the ancient of days

Mutations

Soft:gynfyd
Nasal:nghynfyd
Aspirate:chynfyd

Use

y cynfyd hwn
fy nghynfyd i
dy gynfyd di
ei gynfyd ef/o
ei chynfyd hi
ein cynfyd ni
eich cynfyd chi
eu cynfyd nhw/hwy
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