名詞 back fire:

1. the backward escape of gases and unburned gunpowder after a gun is fired
   同義詞：blowback, backfire
2. a loud noise made by the explosion of fuel in the manifold or exhaust of an internal combustion engine
   同義詞：backfire
3. a fire that is set intentionally in order to slow an approaching forest fire or grassfire by clearing a burned area in its path
   同義詞：backfire
4. a miscalculation that recoils on its maker
   同義詞：backfire, boomerang

動詞 back fire:

1. come back to the originator of an action with an undesired effect
   同義詞：backfire, backlash, recoil
2. emit a loud noise as a result of undergoing a backfire
   同義詞：backfire
3. set a controlled fire to halt an advancing forest to prairie fire
   同義詞：backfire