in English is:

phenology

Mutations

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

Use

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