Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
pentàgon
←
Catalan
penta
(confix)
←
Catalan
gon
(confix)
→
Catalan
pentagonal
(suffix)