Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
sospeita
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Galician
sospeitar
(back-formation)
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Old Portuguese
sospeita
(inherited)
→
Galician
sospeitoso
(affix)