gravel

noun

1. a loose mixture of pebbles and rock fragments coarser than sand, often mixed with clay, etc.
2. Med. a deposit of small concretions that form in the kidneys or gallbladder and that may be retained, passed on to the urinary bladder, or passed from the body

transitive verb graveled or gravelled, graveling or gravelling

1. to cover (a walk, driveway, etc.) with gravel
2. to embarrass or perplex
3. ☆ Informal to irritate or annoy