ax

Definition

An ax is tool used for cutting or chopping trees or wood.

An ax usually has a long wooden handle with a large metal blade attached to the end.
If your culture has a tool that is similar to this, the name of that tool could be used to translate "ax."
Other ways to translate this term could be, "tree-cutting tool" or "wooden tool with blade."
In one Old Testament, the blade of an ax falls into the river so it is best if the tool that is described has a blade that can come off the wooden handle.