köken: Zins (“interest”) + -es- + Zins, literally “interest of interest”. First attested in the dictionary by Kaspar von Stieler (1691), with the gloss "zins auf zins anatocismus, usura usurarum".
köken: Compound of bunga (“flower”) + berbunga (“flowering”), literally “flowering flower”, calque of Dutch rente op rente (“compound interest”, literally “interest of interest”). Compare to German Zinseszins.