Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Romanian
cupeț
←
Czech
kupec
(cognate)
←
Proto-Germanic
*kaupōną
(derived)
←
Proto-Germanic
*kaupô
(mention)
←
Latin
caupo
(derived)
←
Polish
kupiec
(cognate)
←
Slovak
kupec
(cognate)
←
Proto-Slavic
*kupьcь
(borrowed)
←
Proto-Slavic
*kupiti
(derived)
←
Ukrainian
купець
(cognate)
→
Romanian
Cupeț
(mention)