Clenching one’s teeth in pain, anger, or effort.

• Used especially in the phrase grit one’s teeth.

Spreading grit or salt on a surface, especially winter roads.

• Covering a surface with grit to improve traction or melt ice.

Making a harsh, grating sound like sand underfoot.

• Grinding or scraping noisily.

The act of spreading grit or salt on a surface.

• Road treatment with grit during icy conditions.