Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Breton
gwelet
←
Proto-Brythonic
*u̯āl-
(inherited)
←
Proto-Celtic
*weleti
(inherited)
←
Welsh
gweld
(cognate)
←
Proto-Indo-European
*wel-
(root)
←
Cornish
gweles
(cognate)
←
Old Breton
guilinn
(inherited)
←
Middle Breton
guelet
(inherited)
→
Breton
rakwelet
(affix)
→
Welsh
gweld
(cognate)
→
Cornish
gweles
(cognate)