Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Slovak
kupec
←
Slovak
kúpiť
(suffix)
←
Slovak
ec
(suffix)
←
Proto-Slavic
*kupьcь
(inherited)
→
Romanian
cupeț
(cognate)
→
Slovak
kníhkupec
(compound)