Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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German Kauf
English cheap (cognate)
Finnish kauppa (cognate)
North Frisian kuup (cognate)
West Frisian keap (cognate)
Old High German kouf (inherited)
Ancient Greek κάπηλος (cognate)
Icelandic kaup (cognate)
Icelandic kaupa (mention)
Low German kopen (cognate)
Dutch koop (cognate)
Dutch kopen (mention)
Swedish köp (cognate)
Swedish köpa (mention)

English cheap (cognate)
English Koff (derived)
German Kaufpreis (compound)
German Rückkauf (affix)
German Kaufreue (compound)
German Kaufhalle (compound)
German Hamsterkauf (compound)
Estonian kaup (cognate)
Finnish kauppa (cognate)