Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Hellenic
*dúwō
→
Greek
δύο
(inherited)
→
Ancient Greek
δύο
(inherited)
→
Ancient Greek
δύω
(inherited)
→
Calabrian Greek
dìo
(inherited(grk-cal/el))