Halberd

n. old fashioned weapon with both a spear and a battle-ax, halbert

A halberd (or Swiss voulge) is a two-handed pole weapon that came to prominent use during the 14th and 15th centuries. Possibly the word halberd comes from the German words Halm (staff), and Barte (axe). The halberd consists of an axe blade topped with a spike mounted on a long shaft. It always has a hook or thorn on the back side of the axe blade for grappling mounted combatants. It is very similar to certain forms of the voulge in design and usage.
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Noun
1. a pike fitted with an ax head
(hypernym) pike
(part-meronym) battle-ax, battle-axe

(n.)
An ancient long-handled weapon, of which the head had a point and several long, sharp edges, curved or straight, and sometimes additional points. The heads were sometimes of very elaborate form.
  

wang2 ji3 de2 mao2
Losing a halberd and gaining a spear
The loss is made up by the gain.