Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Dutch
koop
←
Middle Dutch
côop
(inherited)
←
Proto-Germanic
*kaupaz
(inherited)
←
Dutch
kopen
(mention)
←
Dutch
koopje
(mention)
←
Dutch
goedkoop
(link)
←
Dutch
huurkoop
(link)
←
Dutch
koopjesjacht
(link)
←
Dutch
koopjesjager
(link)
←
Dutch
miskoop
(link)
←
Dutch
voorkoop
(link)
←
Dutch
kopen
(link)
←
Old Dutch
*cōp
(inherited)
→
English
cheap
(cognate)
→
German
Kauf
(cognate)
→
Dutch
verkoop
(prefix)
→
Dutch
aankoop
(compound)
→
Dutch
koopman
(affix)
→
Dutch
afkoop
(compound)
→
Dutch
voorkoop
(compound)
→
Dutch
koopvaarder
(affix)
→
Dutch
beeldjeskoop
(compound)
→
Dutch
miskoop
(prefix)
→
Dutch
Nieuwkoop
(compound)
→
Dutch
huurkoop
(compound)