Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Estonian
-tuma
←
Finnish
-tua
(cognate)
←
Proto-Finnic
*-tudak
(inherited)
→
Estonian
käituma
(affix)
→
Finnish
-tua
(cognate)