in English is:

dendrochronology

Mutations

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

Use

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