Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Greek
έξι
←
Ancient Greek
ἕξ
(inherited)
←
Proto-Hellenic
*hwéks
(inherited)
←
Proto-Indo-European
*swéḱs
(inherited)
→
Persian
شش
(cognate)