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