in English is:

sedimentology

Mutations

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

Use

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