reduce (something) to small particles or powder by crushing it

grind some black pepper over the salad

she ground up the rice prior to boiling

rub or cause to rub together gratingly

mountain ranges developed along fault lines where tectonic plates ground against one another

he keeps me awake at night, grinding his teeth

(of a dancer) gyrate the hips erotically

there were sweaty bodies everywhere bumping and grinding to the music

a crushing or grating sound or motion

the crunch and grind of bulldozers

the slow grind of the US legal system

hard dull work

relief from the daily grind

a dancer's erotic gyration of the hips

a bump and grind