misfire >> mɪsˈfʌɪə
Definition: [verb] (of a gun or missile) fail to discharge or fire properly.
Example: as she raised her pistol again, it misfired
Definition: [verb] (especially of a plan) fail to produce the intended result.
Example: he didn't know that his plan had misfired
Definition: [noun] a failure of a gun or missile to fire correctly.
Example: the weapons are to be replaced because of problems with misfires