Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Finnish
-kainen
←
Finnish
-kka
(suffix)
←
Finnish
-inen
(suffix)
→
Finnish
Lemminkäinen
(affix)
→
Finnish
outokainen
(affix)
→
Finnish
keijukainen
(affix)
→
Ingrian
-kkain
(cognate)