Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Slovak
ostrov
←
Proto-Indo-European
*strow-
(derived)
←
Proto-Slavic
*ostrovъ
(inherited)
→
Slovak
súostrovie
(confix)