Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
French
sérum
←
Latin
serum
(borrowed)
→
English
serum
(cognate)
→
French
lactosérum
(prefix)
→
French
sérumthérapie
(affix)
→
French
sérique
(suffix)
→
Romanian
ser
(borrowed)