Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Slavic
*bъrna
→
Bulgarian
бърна
(inherited)
→
Serbo-Croatian
brnjica
(derived)
→
Serbo-Croatian
брњица
(mention)