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furnish with a grate;
"a grated fireplace"
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gnaw into; make resentful or angry;
"The injustice rankled her"
"his resentment festered"
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reduce to small shreds or pulverize by rubbing against a rough or sharp perforated surface;
"grate carrots and onions"
"grate nutmeg"
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make a grating or grinding sound by rubbing together;
"grate one's teeth in anger"
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scratch repeatedly;
"The cat scraped at the armchair"