Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
llysiau
←
Breton
louzoù
(cognate)
←
Proto-Celtic
*lussus
(inherited)
←
Proto-Celtic
*lubā
(cognate)
←
Cornish
losow
(cognate)
→
Welsh
llys
(mention)
→
Welsh
llysieua
(affix)
→
Welsh
llysieuol
(affix)
→
Welsh
llysieuwr
(suffix)