Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
sneachta
←
Proto-Indo-European
*snígʷʰs
(inherited)
←
Old Irish
snechtae
(inherited)
→
Irish
sneachtúil
(affix)
→
Irish
sneachtach
(affix)