Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
labar
←
Proto-Celtic
*ɸlabros
(inherited)
→
Old Irish
labraithir
(affix)
→
Old Irish
amlabar
(affix)