grind into

grind something into something

 
1. to pulverize something into powder, grit, particles, etc. The machine ground the rocks into gravel. The mill ground the grain into flour.
2. and grind something in to crush or rub something into something. People's feet ground the cigarette ashes into the carpet. Their feet ground in the ashes.
See also: grind

grind into

v.
1. To change the state of something to some other state by grinding: In this recipe you have to grind the rice into a fine powder.
2. To instill or teach something by persistent repetition: The instructor ground the lessons into their heads.
See also: grind