Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Finnish
vaaksa
←
Proto-Finnic
*vaksa
(inherited)
←
Erzya
вакс
(cognate)
→
Finnish
vaaksiainen
(suffix)