twibill

noun

1. A two-edged tool used in gate-type hurdle-making for cutting out mortises, with a flat chisel and a mortise chisel or hook, similar to the much larger French carpenter's tool, the besaiguë (or bisaiguë).
2. (British, dialectal)A mattock with one blade like an axe and the other like an adze.
3. (England, dialectal)A reaping hook, especially for cutting beans and peas.
4. (obsolete)A double-bladed halberd or battle-axe.

   “[A] little fair-haired man, as broad as he was tall, who heaved up a long “twybill,” or double axe.”