Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Bulgarian
съсед
←
Polish
sąsiad
(cognate)
←
Russian
сосе́д
(cognate)
←
Proto-Slavic
*sǫsědъ
(inherited)