Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Romanian
precupeț
←
Bulgarian
прекупец
(borrowed)
←
Proto-Germanic
*kaupōną
(derived)
←
Proto-Germanic
*kaupô
(mention)
←
Latin
caupo
(derived)
←
Proto-Slavic
*kupьcь
(derived)
←
Proto-Slavic
*kupiti
(mention)
→
Romanian
Precupețu
(mention)