backfire

• 名词，指枪炮射击后向后喷出的气体或由此产生的声响；也指发动机排气管发出的爆响；还指为阻止林火蔓延而有意放火的对烧法；以及比喻计划产生与预期相反的不良后果。

A noun referring to the backward escape of gases from a gun after firing, a loud noise from an engine's exhaust, a controlled fire set to stop an advancing wildfire, or a plan that produces an undesired result.

1. Gun backfireC1formal

   The backward escape of gases and unburned gunpowder after a gun is fired.

   回火

   • The old rifle produced a loud backfire when it was discharged.
   • A backfire from the pistol startled everyone in the shooting range.
   • The soldier checked the weapon for a possible backfire.

   同义词blowbackflashback

2. Engine backfireB2informaltechnical

   A loud noise made by the explosion of fuel in the manifold or exhaust of an internal combustion engine.

   发动机回火

   • The car's engine gave a sudden backfire as it started.
   • Motorcycles often produce a backfire when decelerating.
   • The mechanic diagnosed the backfire as a timing issue.

3. Controlled fireC1formalscientific

   A fire that is set intentionally in order to slow an approaching forest fire or grassfire by clearing a burned area in its path.

   计划烧除

   • The firefighters set a backfire to stop the wildfire from spreading.
   • A backfire was used to protect the nearby village.
   • The crew carefully planned the backfire to ensure safety.

4. Unintended consequenceB2informal

   A miscalculation that recoils on its maker, resulting in an undesired effect.

   反效果

   • His plan to embarrass her backfired when she turned the tables.
   • The marketing campaign backfired and caused a public relations disaster.
   • Their attempt to cut costs backfired, leading to higher expenses.

   同义词backlashblowbackboomerangreboundrecoilrepercussion

• 动词，指计划或行动产生了与预期相反的效果，往往导致不利或事与愿违的结果。

A verb used to indicate that a plan or action has the opposite effect of what was intended, often resulting in an undesirable outcome.

1. Adverse resultB2formal

   To have the opposite effect from what was intended, resulting in failure or harm.

   适得其反

   • His plan to embarrass her backfired and made him look foolish.
   • The new policy backfired, causing more problems than it solved.
   • Their attempt to discredit the witness backfired when the evidence was proven false.

   同义词boomerangmiscarrymisfirerebound

   反义词satisfysucceedwork

2. Engine noiseB2informaltechnical

   To produce a loud explosive sound in an internal combustion engine due to improper fuel combustion.

   发动机回火

   • The old truck backfired loudly as it started up.
   • The car's engine backfired, startling everyone nearby.
   • Motorcycles often backfire when the fuel mixture is too rich.

   同义词bangcoughpop

3. Controlled fireC1formalscientific

   To set a deliberate fire to stop an advancing wildfire by creating a burned area in its path.

   计划烧除

   • Firefighters backfired to protect the town from the approaching wildfire.
   • The crew backfired along the ridge to create a firebreak.
   • They decided to backfire the area to prevent the forest fire from spreading.

   同义词burn out