Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
stjúpbarn
←
Icelandic
stjúp
(prefix)
←
Icelandic
barn
(prefix)
→
English
stepbairn
(cognate)