Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Serbo-Croatian
struk
←
Proto-Slavic
*strǫkъ
(inherited)
→
Serbo-Croatian
trostruk
(confix)
→
Serbo-Croatian
трострук
(confix)