Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Dutch
observatie
←
Middle French
observation
(derived)
←
Latin
observātiō
(derived)
←
Dutch
observeren
(suffix)
←
Dutch
atie
(suffix)
→
Dutch
observatiepost
(compound)