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English definition of “grind”

grind

verb [T] (RUB)   /ɡrɑɪnd/ (past tense and past participle ground  /ɡrɑʊnd/)
to rub an object against a hard surface in order to make it sharper, thinner, or smoother: Laborers grind and shape steel bars into decorative fences. If you grind two sets of objects, you press and rub them together in a way that makes an unpleasant noise: Ursula grinds her teeth at night.
(Definition of grind verb (RUB) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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