Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ingrian
poikin
←
Finnish
poikki
(cognate)
←
Proto-Finnic
*poikki
(derived)
→
Ingrian
poiz
(suffix)