Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Latin
contagium
←
Latin
con-
(prefix)
←
Latin
*tagium
(prefix)
←
Latin
tango
(mention)
→
English
contagium
(borrowed)