Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle Irish
dóendacht
←
Middle Irish
dóenda
(affix)
←
Middle Irish
-acht
(affix)
←
Old Irish
dóenacht
(derived)
→
Irish
daonnacht
(inherited)
→
Middle Irish
dóendachtach
(affix)