Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
kupiec
←
Polish
kupić
(affix)
←
Polish
-ec
(affix)
←
Proto-Slavic
*kupьcь
(inherited)
→
Polish
Kupiec
(mention)
→
Polish
kupiecki
(suffix)
→
Romanian
cupeț
(cognate)