Petard
WordNet
noun
(1) A explosive device used to break down a gate or wall
WiktionaryText
Etymology
Latin; pedere "to break wind" via Middle French; from peter "to break wind" from pet "expulsion of intestinal gas"
Noun
- A hat shaped explosive device, now rarely used.
- Anything potentially explosive in a non-literal sense
- For tis the sport to haue the enginer / Hoist with his owne petar - Hamlet, Shakespeare
- A loud firecracker.