A ridge or hill of sand piled up by the wind.
A small hill
A protuberance; a swelling; a knob.
A sharp blow or slap.
The crest of a hill
To rap or strike sharply.
To shape a brittle material having conchoidal fracture, usually a mineral (flint, obsidian, chert etc.), by breaking away flakes, often forming a sharp edge or point.
To make a sound of snapping.