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Related to grind away: grind down
grind something away
to remove something by grinding. Grind the bumps away and make the wall smooth. Please grind away the bumps.
grind away (at something)
to crush something into particles continually. The machine ground away at the rocks, making tons of gravel. It ground away, making a terrible noise in the process.
(at someone) Fig. to needle, criticize, and nag someone continually. Why are you always grinding away at me? Leave me alone. Stop grinding away!
1. To remove something by grinding: You need to grind the spurs away with a file. The optician ground away the glass from the lens.
2. To devote oneself to study or work: She ground away at the problem. We told him to get some sleep before the exam, but he kept grinding away.