Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Romanian
ser
←
French
sérum
(borrowed)
←
Latin
serum
(borrowed)
←
Romanian
zer
(mention)
→
Romanian
seroprofilaxie
(prefix)