What does "wedge" mean here? [closed]

Wedge:

A piece of wood, metal, or some other material having one thick end and tapering to a thin edge, that is driven between two objects or parts of an object to secure or separate them.

There's nothing like context to help one along....

The sentence is taken from The Liar's Key by Mark Lawrence, a fantasy writer. If you google and read a few lines, the Nordic/Viking implication is clear.

The trick is that usually one thinks of a tip of a sword rather than the wedge of an axe.

The Vikings et alia used stone axes and metal axes of various kinds.

This book takes place in a Nordic scenario like that, real or imagined.

See many wedges here

From that same site, I just could not resist this image:

Steve Carrell as Viking warrior? [That's a joke....]