Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Romanian
pocăi
←
Old Church Slavonic
покаꙗти
(borrowed)
←
Proto-Slavic
*kajati
(derived)
→
Romanian
pocăială
(suffix)
→
Romanian
pocăință
(suffix)
→
Romanian
pocăire
(suffix)
→
Romanian
pocăit
(mention)