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German kaufen
← English cheapen (mention)
← Proto-Germanic *kaupōną (inherited)
← Proto-Germanic *kaupô (derived)
← Middle High German koufen (inherited)
← Proto-West Germanic *kaupōn (inherited)
← Old High German koufōn (inherited)
← Latin caupo (derived)
← Dutch kopen (cognate)

→ English cheap (mention)
→ English cope (cognate)
→ Danish købe (cognate)
→ German Käufer (suffix)
→ German Kaufmann (affix)
→ German verkaufen (prefix)
→ German Kaufhaus (compound)
→ German Kaufkraft (compound)
→ German käuflich (suffix)
→ German einkaufen (prefix)
→ German abkaufen (prefix)
→ German ankaufen (prefix)
→ German zurückkaufen (prefix)
→ German Koofmich (mention)
→ German erkaufen (prefix)
→ German loskaufen (prefix)
→ German freikaufen (compound)
→ German Kaufsucht (compound)
→ Finnish kaupunki (cognate)
→ Luxembourgish kafen (cognate)
→ Old Norse kaupa (cognate)
→ Pennsylvania German kaafe (cognate)
→ Saterland Frisian koopje (cognate)
→ Swedish köpa (cognate)