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Definition of sharpen:

  1. To give a keen edge or fine point to; to make sharper; as, to sharpen an ax, or the teeth of a saw.
  2. To grow or become sharp.
  3. To make biting, sarcastic, or severe.
  4. To make more eager; as, to sharpen men's desires.
  5. To make more pungent and intense; as, to sharpen a pain or disease.
  6. To make more tart or acid; to make sour; as, the rays of the sun sharpen vinegar.
  7. To make sharp.
  8. To raise, as a sound, by means of a sharp; to apply a sharp to.
  9. To render more quick or acute in perception; to make more ready or ingenious.
  10. To render more shrill or piercing.


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