Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
cisco
←
Proto-Celtic
*sexskā
(derived)
←
Spanish
cisco
(cognate)
←
Proto-Indo-European
*sek-
(derived)
←
Latin
(derived)