Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Bulgarian
сред
←
Proto-Slavic
*serdъ
(inherited)
←
Proto-Slavic
*serdà
(cognate)
←
Ukrainian
се́ред
(cognate)