grate
noun
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a frame of iron bars to hold a firegrating
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a barrier that has parallel or crossed bars blocking a passage but admitting airgrating
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a harsh rasping sound made by scraping something
verb
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scratch repeatedlyscrape
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make a grating or grinding sound by rubbing together“grate one's teeth in anger”grind
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reduce to small shreds or pulverize by rubbing against a rough or sharp perforated surface“grate carrots and onions”
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gnaw intofret
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furnish with a grate“a grated fireplace”