gi·sarme 
(gĭ-zärm)
(gĭ-zärm)n.
A halberd with a long shaft and two-sided blade, carried by medieval foot soldiers.
[Middle English, from Old French guisarme, possibly from Old High German getīsarn : getan, to weed + īsarn, iron; see eis- in the Appendix of Indo-European roots.]