ישעיהו נד:יז פירוש: רש״י ואבן עזרא

Any weapon whetted against you Any weapon that they will whet and sharpen for you, i.e., to battle with you.

יוצר עליך That is formed against thee. Shall not prosper, to become what it is destined to be; but it will be broken. יוצר Is formed. It is Hophal, similar in form to יוסר is taken away, (Lev. 4:35).

whetted Heb. יוּצַר, an expression similar to (Jos. 5:2) “sharp knives (חַרְבוֹתצֻרִים),” also (Ps. 89:44) “You have also turned the edge of his sword (צוּר חַרְבּוֹ).”