Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Dutch
oct
→
Dutch
octyl
(confix)
→
Dutch
octaan
(confix)
→
Dutch
octeen
(confix)
→
Dutch
octyn
(confix)