'Sharpened' in the Bible

“Son of man, prophesy and say, ‘Thus says the Lord.’ Say,‘A sword, a sword sharpenedAnd also polished!

‘Sharpened to make a slaughter,Polished to flash like lightning!’Or shall we rejoice, the rod of My son despising every tree?

It is given to be polished, that it may be handled; the sword is sharpened and polished, to give it into the hand of the slayer.