in English is:

pedology

,

soil science

Mutations

Soft:briddeg
Nasal:mhriddeg
Aspirate:phriddeg

Use

y briddeg hon
fy mhriddeg i
dy briddeg di
ei briddeg ef/o
ei phriddeg hi
ein priddeg ni
eich priddeg chi
eu priddeg nhw/hwy
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