noun
a person who sharpens things or makes them more acute
adjective
describing a person or thing that is more keen or intelligent
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The surgeon used a sharper scalpel to make precise incisions during the operation.
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I need to buy a sharper knife for cutting vegetables in the kitchen.
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Dude, you need to get a sharper haircut before the party.
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Her wit is sharper than a knife, always quick with clever comebacks.