grind down

Definitions

1. 1

   To make something hard smaller and smoother by gradually rubbing off tiny bits

   To make something hard smaller and smoother by gradually rubbing off tiny bits; to wear down by grinding action.

   • The old dog's teeth had been ground down by constant use.
2. 2

   To weaken someone's morale over a long period.

   • Djokovic broke twice in each of the opening two sets, dismantling 6ft 8in Anderson's service game and grinding him down in the rallies.

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