Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ancient Greek
Βλάχος
←
Old Church Slavonic
влахъ
(borrowed)
←
Proto-Germanic
*walhaz
(derived)
←
Proto-Slavic
*volxъ
(derived)
→
Ancient Greek
Βλαχία
(affix)