Noun
atgeir (plural atgeirs)
A kind of spear-like polearm used by the Norse, conventionally translated as halberd, but of uncertain precise nature.
That thing follows it too that it is known at once when a man is to be slain with that atgeir, for something sings in it so loudly that it may be heard a long way off — such a strong nature has that atgeir in it. Source: Internet