Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Romanian
colac
←
Bulgarian
колач
(cognate)
←
Czech
koláč
(cognate)
←
Polish
kołacz
(cognate)
←
Russian
калач
(cognate)
←
Serbo-Croatian
kolač
(cognate)
←
Proto-Slavic
*kolačь
(borrowed)
→
Romanian
colăcel
(suffix)
→
Romanian
Colacu
(mention)
→
Romanian
Colac
(mention)