Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
towarzysz
←
Proto-Slavic
*tovarišь
(inherited)
→
Polish
towarzyski
(affix)
→
Romanian
tovarăș
(cognate)