what is "sharpening"

Terms with 'sharpen' at beginning (3):
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Terms with 'sharpen' included (2):
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Meaning of "sharpening" (0):

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    Flop to come up with the expression "sharpening" in meanings, yet looking for "sharpening" as well as analogous locutions the list at the top could be disclosed.

Furthermore exploration for definition, synonyms and antonyms of "sharpening", connected together with inverse examinations of "sharpening" were done.

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