Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Danish
købe
←
German
kaufen
(cognate)
←
Proto-Germanic
*kaupōną
(inherited)
←
Proto-Germanic
*kaupijaną
(mention)
←
Old Danish
køpæ
(inherited)
←
Latin
caupō
(derived)
←
Dutch
kopen
(cognate)
←
Old Norse
kaupa
(derived)
←
Old Norse
keypta
(mention)
→
Danish
køb
(mention)
→
Danish
køber
(suffix)
→
Danish
købmand
(compound)
→
Danish
købedygtig
(affix)
→
Danish
købstad
(compound)
→
Norwegian Bokmål
kjøpe
(derived)
→
Norwegian Bokmål
kjøp
(derived)
→
Norwegian Bokmål
ab-kjøp
(derived)
→
Swedish
köpa
(cognate)