Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Church Slavonic
сꙑръ
←
Proto-Slavic
*syrъ
(derived)
→
Bulgarian
чорба
(cognate)
→
Lower Sorbian
sera
(cognate)
→
Lower Sorbian
syry
(cognate)