Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Greek
πενήντα
←
Ancient Greek
πεντήκοντα
(inherited)
←
Proto-Indo-European
*penkʷēḱomth₂
(inherited)
←
Proto-Indo-European
*pénkʷe(d)ḱomt
(mention)
→
Greek
πενηντάρικο
(suffix)