Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle Irish
céttadall
←
Proto-Indo-European
*pelh₂-
(root)
←
Middle Irish
cét-
(affix)
←
Middle Irish
tadall
(affix)