knap

To break away flakes from (a brittle material which fractures conchoidally (“with planar concentric curves”), usually a mineral such as chert, flint, or obsidian), often to form a tool with a sharp edge or point.

(dialect, UK) To break (something) into small pieces with a cracking sound; to fragment, to smash; also, to break (something) apart sharply; to snap.

(dialect, UK) Followed by off: to break (something) away from another thing by striking or tapping sharply.

(dialect, UK) To break or fracture suddenly; to snap.

(dialect, UK) To strike (something) sharply; to knock, to rap.

(dialect, UK) To strike sharply.

(dialect, UK) To make a cracking or snapping sound; to crack, to snap.

(dialect, UK) To take a small, quick bite at or of (someone or something); to nibble, to nip, to snap.

(dialect, UK) To take a small, quick bite.

(dialect, figurative) To say (something) crisply or sharply.

(dialect, figurative) To speak crisply or sharply.

(figurative, no longer used) To cheat while gambling, especially at a dice game.

(dialect, UK) A piece of raised ground or a short, steep slope; a small hill; a hillock, a knoll.

(dialect, UK) The crest or top of a hill.

(dialect) A sudden, sharp blow, knock, or slap; a rap, a whack.

(dialect) The sound made by such a blow, knock, or slap.

(dialect) Synonym of chattering damsel (“a component of a traditional mill which creates a vibratory motion to impel portions of grain toward the millstone; a clapper”).

(figurative, no longer used) A method of cheating at a dice game.