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