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