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1.
make sharp or sharper
sharpen the knives
We had to sharpen our arguments
2.
become sharp or sharper
The debate sharpened
3.
put (an image) into focus
4.
make (images or sounds) sharp or sharper
5.
raise the pitch of (musical notes)
6.
give a point to
7.
make (one's senses) more acute
This drug will sharpen your vision
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derived forms
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1. Sharpen / Past
sharpened
2. Sharpen / Third Person
sharpens
3. Sharpen / Present Participle
sharpening
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