backfire
//ˌbækˈfaɪər//
Verb
backfireInfinitive
backfirePresent tense
backfiredPast tense
backfiredPast participle
backfiringPresent participle
backfiresThird-person singular
1
(of a plan or action) to have the opposite effect to what was intended, often with harmful consequences.
His plan to surprise her backfired when she found out about it early.
2
(of an engine or vehicle) to make a loud explosive noise as a result of fuel igniting in the exhaust system or intake manifold.
The old car backfired loudly when I started the engine.
Noun
1
A loud explosion in the exhaust or intake system of an internal combustion engine.
The old car made a loud backfire when I started the engine.
2
A fire started deliberately to stop the advance of an approaching wildfire by removing combustible material.
The firefighters set a backfire to stop the wildfire from spreading further.