Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Czech
náčelník
←
Czech
ná-
(affix)
←
Czech
čelo
(affix)
←
Czech
-ník
(affix)
→
Polish
naczelnik
(cognate)