gravel

Small fragments of rock, used for laying on the beds of roads and railways, and as ballast.

A type or grade of small rocks, differentiated by mineral type, size range, or other characteristics.

A particle from 2 to 64 mm in diameter, following the Wentworth scale

Kidney stones; a deposit of small calculous concretions in the kidneys and the urinary or gall bladder; also, the disease of which they are a symptom.

To apply a layer of gravel to the surface of a road, etc.

To puzzle or annoy

To run (as a ship) upon the gravel or beach; to run aground; to cause to stick fast in gravel or sand.

To check or stop; to embarrass; to perplex.

To hurt or lame (a horse) by gravel lodged between the shoe and foot.