Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
caomheagar
←
Irish
caomh
(affix)
←
Irish
eagar
(affix)
←
Proto-Indo-European
*ḱey-
(root)