GRIND English Definition and Meaning | Lexico
1.1. Sharpen, smooth, or produce (something) by crushing or by friction. 'power from a waterwheel was used to grind cutlery'. More example sentences. 'The large upright stone also bears the marks of where new adze heads were ground and sharpened.'. 'After cooling slowly, the piece is then ground to remove excess enamel, and polished.'.