Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Russian
чешский
←
Old East Slavic
чешьскъ
(inherited)
←
Russian
чех
(affix)
←
Russian
-ский
(affix)