Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Cornish
kerrik
←
Cornish
karr
(affix)
←
Cornish
-ik
(affix)
→
Cornish
karigell
(affix)