Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Cornish
lyver
←
Breton
levr
(cognate)
←
Proto-Brythonic
*llɨvr
(inherited)
←
Welsh
llyfr
(cognate)
←
Latin
liber
(derived)
→
Breton
levr
(cognate)
→
Cornish
gerlyver
(compound)
→
Cornish
lyvrow
(suffix)
→
Cornish
elyver
(affix)