knap

To break or chip (stone) with sharp blows, as in shaping flint or obsidian into tools.

To strike sharply; rap.

To snap at or bite.

To strike with a sharp noise.

To snap; crack; break in pieces with blows: as, to knap stones.

To bite; bite off; nibble.

To make a short sharp sound.

To talk short.

A short sharp noise; a snap.