Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
leithscéalach
←
Irish
leithscéal
(suffix)
←
Irish
ach
(suffix)
←
Proto-Indo-European
*sekʷ-
(root)