Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
pus
←
Middle Irish
bus
(inherited)
→
English
puss
(derived)
→
Irish
puisín
(affix)
→
Irish
pusach
(suffix)