'Sharp' in the Bible

But all the Israelites had to go to the Philistines to get their ploughs and blades and axes and hooks made sharp;

And between the passages, by which Jonathan sought to go over unto the Philistines' garrison, there was a sharp rock on the one side, and a sharp rock on the other side: and the name of the one was Bozez, and the name of the other Seneh.