Verb
1. press or grind with a crunching noise
2. make a grating or grinding sound by rubbing together;
"grate one's teeth in anger"3. reduce to small pieces or particles by pounding or abrading;
"grind the spices in a mortar""mash the garlic"4. work hard;
"She was digging away at her math homework""Lexicographers drudge all day long"5. dance by rotating the pelvis in an erotically suggestive way, often while in contact with one's partner such that the dancers' legs are interlaced