Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ido
kin
←
Spanish
cinco
(derived)
←
French
cinq
(derived)
←
Proto-Indo-European
*pénkʷe
(derived)
←
Italian
cinque
(derived)