Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
carbad
←
Proto-Celtic
*karbantos
(derived)
←
Irish
carbadóir
(link)
←
Old Irish
carpat
(derived)
→
Irish
fo-charbad
(affix)
→
Old Irish
Cormac
(mention)