Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Romanian
tângui
←
Proto-Slavic
*tǫgovati
(borrowed)
←
Proto-Slavic
*tǫga
(mention)
→
Romanian
tânguire
(suffix)
→
Romanian
tânguitor
(suffix)