Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
cywair
←
Proto-Brythonic
*küwėr
(inherited)
←
Welsh
cyweirio
(link)
←
Old Welsh
couer
(inherited)
←
Middle Welsh
kyweir
(inherited)
←
Middle Welsh
cyweir
(mention)
→
Welsh
cyweirio
(affix)
→
Old Irish
cóir
(cognate)