Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Dutch
onbekend
←
Middle Dutch
onbekent
(inherited)
←
Dutch
on
(prefix)
←
Dutch
bekend
(prefix)
→
Afrikaans
onbekend
(inherited)
→
Dutch
on-
(link)