Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Slavic
*dъlžьnъ
→
Bulgarian
длъжен
(inherited)
→
Polish
dłużny
(inherited)
→
Serbo-Croatian
dužan
(inherited)