in English is:

fertilization

Mutations

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

Use

y ffrwythloniad hwn
fy ffrwythloniad i
dy ffrwythloniad di
ei ffrwythloniad ef/o
ei ffrwythloniad hi
ein ffrwythloniad ni
eich ffrwythloniad chi
eu ffrwythloniad nhw/hwy
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