Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
Sowiet
←
Russian
сове́т
(borrowed)
→
Polish
Sowietka
(suffix)
→
Polish
sowietologia
(suffix)
→
Polish
sowietolog
(suffix)