billhook

1. A medieval polearm with a similar construct, fitted to a long handle, sometimes with an L-shaped tine or a spike protruding from the side or the end of the blade for tackling the opponent; a bill
2. An agricultural implement often with a curved or hooked end to the blade used for pruning or cutting thick, woody plants.
3. Written as bill-hook: a part of the knotting mechanism in a reaper-binder or baler (agricultural machinery).
4. Written as bill hook: a spiked hook used in offices and shops for hanging bills or other small papers such as receipts.
5. Written as bill hook: a sharply pointed spike growing from the tip of the upper mandible of the hatchlings of honeyguides, used to destroy the eggs and kill the chicks of the host species.

verb

To use a billhook