Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
gwerthu
←
Breton
gwerzhañ
(cognate)
←
Welsh
gwerth
(affix)
←
Welsh
-u
(affix)
←
Cornish
gwertha
(cognate)
→
Breton
gwerzhañ
(cognate)
→
Welsh
peiriant gwerthu
(affix)
→
Welsh
arwerthu
(affix)
→
Welsh
gwerthiant
(affix)
→
Welsh
gwerthwr
(affix)
→
Welsh
mân-werthu
(affix)