Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Serbo-Croatian
potok
←
Serbo-Croatian
po
(prefix)
←
Serbo-Croatian
tok
(prefix)
←
Proto-Slavic
*potokъ
(inherited)