Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle Irish
badbda
←
Old Irish
bodbdae
(inherited)
←
Old Irish
Badb
(affix)
←
Old Irish
-de
(affix)
→
Irish
badhbha
(inherited)