Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
ceannas
←
Irish
ceann
(affix)
←
Irish
-as
(affix)
←
Old Irish
cennas
(inherited)
→
Irish
ceannasach
(affix)
→
Irish
ardcheannas
(affix)
→
Irish
ceannasaí
(affix)