Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Breton
kador
←
Ancient Greek
καθέδρα
(derived)
←
Latin
cathedra
(borrowed)
←
Middle Breton
cadoer
(inherited)
→
Breton
kadorioù
(suffix)