Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Cornish
Sowsnek
←
Cornish
Sowson
(suffix)
←
Cornish
ek
(suffix)
→
Cornish
Sowsneger
(suffix)