Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
colinn
←
Proto-Celtic
*kolannis
(inherited)
←
Proto-Indo-European
*kel-
(inherited)
→
Irish
colainn
(inherited)
→
Old Irish
colnide
(affix)