Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
pryf
←
Breton
preñv
(cognate)
←
Proto-Brythonic
*prɨβ̃
(inherited)
←
Proto-Celtic
*kʷrimis
(inherited)
←
Cornish
pryv
(cognate)
←
Old Welsh
prem
(inherited)
→
Welsh
pryfyn
(suffix)
→
Welsh
pryf genwair
(compound)