'Sharpen' in the Bible

Everyone in Israel would have to go to the Philistines so each person could sharpen his plow, his mattock, his axe, and his sickle.

If the ungodly one doesn't repent, God will sharpen his sword; he will string his bow and prepare it.

who sharpen their tongues like swords, and aim their bitter words like arrows,

They sharpen their tongues like a serpent; the venom of vipers is on their lips. Interlude

Sharpen the arrows, fill the quivers! The LORD has stirred up the spirit of the kings of the Medes he has decided to destroy Babylon. Indeed, it's the LORD's vengeance, vengeance for his Temple.