Where does the phrase "hoisted by ones own petard" come from.?

Question:

Answers:
hoist with your own petard, you get into trouble or caught in a trap that you had set for someone else.
conjugation of the french verb "peter". The phrase refers to becoming a victim of one's own evil design or to get a taste of one's own medicine. The petard was a device employed in medieval warfare. It was loaded with an explosive device which if successfully fired could cause a degree of damage. if however the device was exploded prematurely, the person lighting it would be tossed into the air by the force of the blast

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