Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Estonian
õnn
←
Proto-Finnic
*onni
(inherited)
→
Estonian
Õnne
(mention)
→
Estonian
õnnelik
(suffix)
→
Estonian
õnnetu
(affix)
→
Estonian
ebaõnn
(prefix)
→
Finnish
onni
(cognate)