Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
cothromas
←
Irish
cothrom
(affix)
←
Irish
-as
(affix)
←
Old Irish
comthromas
(inherited)
←
Old Irish
comthrom
(mention)
→
Irish
cothromasach
(affix)