Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
polka
←
Czech
polka
(borrowed)
←
Polish
półka
(doublet)
→
Polish
półka
(doublet)
→
Polish
poleczka
(suffix)
→
Romanian
poală
(cognate)