Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Cornish
elyver
←
Welsh
e-lyfr
(cognate)
←
Cornish
e-
(affix)
←
Cornish
lyver
(affix)