Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
eidhneachán
←
Irish
eidheann
(affix)
←
Irish
-achán
(affix)
←
Old Irish
eidnechán
(inherited)
←
Old Irish
eidnech
(mention)