in English is:

geochronology

Mutations

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

* This form is an exception to the mutation rules.

Use

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