A primitive root; to be (causatively make) sharp or (figuratively) severe: - be {fierce} sharpen.
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Psa 57:4My soul is among lions: and I lie even among them that are set on fire, even the sons of men, whose teeth are spears and arrows, and their tongue a sharpH2299 sword.
Isa 49:2And he hath made my mouth like a sharpH2299 sword; in the shadow of his hand hath he hid me, and made me a polished shaft; in his quiver hath he hid me;
Eze 5:1And thou, son of man, take thee a sharpH2299 knife, take thee a barber's razor, and cause it to pass upon thine head and upon thy beard: then take thee balances to weigh, and divide the hair.