Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Polish
bracski
←
Proto-Balto-Slavic
*brā́ˀtiškas
(inherited)
←
Proto-Slavic
*bràtьskъ
(inherited)
→
Polish
bracki
(inherited)