Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Finnish
katku
←
Proto-Finnic
*katku
(inherited)
→
Finnish
rikinkatku
(affix)
→
Finnish
katkuinen
(affix)
→
Finnish
katkuta
(affix)