Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
comigo
←
Galician
con
(mention)
←
Latin
cum
(inherited)
←
Latin
mēcum
(mention)
←
Old Portuguese
migo
(inherited)