Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Finnish
arina
←
Proto-Finnic
*arina
(inherited)
←
Proto-Germanic
<!-- *azina- -->
(derived)
→
Finnish
arinakääpä
(compound)