Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
cwyr
←
Breton
koar
(cognate)
←
Proto-Brythonic
*kuɨr
(inherited)
←
Irish
céir
(cognate)
←
Latin
cēra
(derived)
→
Welsh
cwyraidd
(suffix)
→
Welsh
cwyro
(affix)