Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Romanian
trânti
←
Proto-Slavic
*trǫtiti
(mention)
→
Romanian
trântit
(mention)
→
Romanian
trântă
(back-formation)
→
Romanian
trântire
(suffix)