Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
cagar
←
Proto-Indo-European
*kakka-
(derived)
←
Latin
cacāre
(inherited)
←
Latin
cacō
(mention)
→
Galician
cagalla
(suffix)