Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
crosach
←
Irish
cros
(affix)
←
Irish
-ach
(affix)
←
Proto-Indo-European
*(s)ker-
(root)
←
Old Irish
crosach
(inherited)