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1. To reduce something or cause it to become more even by grinding. In this usage, a noun or pronoun can be used between "grind" and "down." The landscaper ground the tree stump down. Can you please grind down this uneven spot in the floor?
2. To start moving more slowly, as of a machine. Don't touch the machine until it grinds down to a stop.
3. To cause someone to become weary or disillusioned, as by frequently pestering them. In this usage, a noun or pronoun can be used between "grind" and "down." You're going to grind down your employees down if you question every little thing they do.
grind someone down
Fig. to wear someone down by constant requests; to wear someone down by constant nagging. If you think you can grind me down by bothering me all the time, you are wrong. The constant nagging ground down the employees at last.
grind something down
to make something smooth or even by grinding. Grind this down to make it smooth. Please grind down this rough spot.
1. To cause wear on something by rubbing against it, reducing its size: The jeweler ground the opals down into beautiful egg-shaped pieces. The miller ground down the wheat for the farmers.
2. To slow down, as if through a grinding action: The machine eventually ground down to a halt.