Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Greek
είκοσι
←
Ancient Greek
εἴκοσι
(inherited)
←
Proto-Hellenic
*ewīkəti
(inherited)
←
Proto-Indo-European
*wídḱm̥ti
(inherited)
→
Greek
εικοσάρικο
(suffix)