misfire
verb [ I ] uk/ˌmɪsˈfaɪər/ us/ˌmɪsˈfaɪr/
(GUN)
（枪弹）射不出，哑火
If a gun misfires, the bullet fails to come out.
(ENGINE)
（引擎）无法启动，不能正常运行
When an engine misfires, the fuel inside it starts to burn at the wrong moment.
There was a loud bang, like the sound of an engine misfiring. 有一声巨响，像是引擎发动不起来的声音。
(PLAN)
（计划）未达到预期效果，未达到预期目的，失败
If a plan misfires, it does not have the result that was intended.
The boy's death was the result of a practical joke that misfired. 男孩的死是一场恶作剧出的岔子。