gisarme
(ɡɪˈzɑːm) n (Arms & Armour (excluding Firearms)) a long-shafted battle-axe with a sharp point on the back of the axe head
[C13: from Old French guisarme, probably from Old High German getīsarn weeding tool, from getan to weed + īsarn iron]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014