Noun
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a miscalculation that recoils on its maker
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a fire that is set intentionally in order to slow an approaching forest fire or grassfire by clearing a burned area in its path
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a loud noise made by the explosion of fuel in the manifold or exhaust of an internal combustion engine
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the backward escape of gases and unburned gunpowder after a gun is fired
Verb
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set a controlled fire to halt an advancing forest to prairie fire
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emit a loud noise as a result of undergoing a backfire
"My old car backfires all the time"
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come back to the originator of an action with an undesired effect
"Your comments may backfire and cause you a lot of trouble"