Dussack

A Dussack (also dusack, dysack, tesak, tuseckn, thuseckn, disackn, or dusägge, dusegge, dusegg, from the Czech "tesák") is a large type of knife often with a long cutting edge in the front and a shorter in the back. It is thought to originate from Central and Eastern Europe (specifically in Bohemia in 300 AD).