petard

A small bell-shaped bomb used to breach a gate or wall.

A loud firecracker.

(be hoist with one’s own petard) To be undone by one’s own schemes.

An engine of war used to blow in a door or gate, form a From a breach in a wall, etc.

A small paper cartridge used in ornamental fireworks, generally at the end of a lance, so arranged that the flame terminates with an explosion.

A case containing powder to be exploded, esp. a conical or cylindrical case of metal filled with powder and attached to a plank, to be exploded against and break down gates, barricades, drawbridges, etc. It has been superseded.

A small, hat-shaped explosive device, used to blow a hole in a door or wall.

Anything potentially explosive, in a non-literal sense.

A loud firecracker.

To attack or blow a hole in (something) with a petard.