Kabovantsiv, or "karbovanets" is the Ukrainian word for "coupon" and was the unit of currency in Ukraine
forced Ukraine to replace it with the Hryvnia
Ukraine went through the worst inflation between 1993 and 1995. Before 1993, the highest denomination was 1,000 Karbovantsiv. By 1995, it was 1,000,000 Karbovantsiv.