grind together

grind together

1. To cause two things to grate or scrape against each other. In this usage, a noun or pronoun is used between "grind" and "together." I wear a mouthguard at night so that I don't grind my teeth together.2. To grate or scrape against something. I think these parts are grinding together and that's why this side looks so worn.See also: grind, together

grind something together

to rub things together. Stop grinding your teeth together. The stones ground together as we drove over them.See also: grind, together