1) Artillery accident 2) Breakdown 3) Equipment failure 4) Fail to explode 5) Fail to fire or detonate 6) Failed intention 7) Military weapons failure 8) To fail to discharge properly 1) Dud 
[Transformers] ==Summary == Badge of Bollstanäs SK as found on the Bollstanäs SK Official website. Available at http://www.bsk.nu/. ===Fair-use rationale=== ...
The complete or partial failure of a blasting charge to explode as planned.
a failure to establish a discharge between a main anode and a cathode during an intended conduction period
A term used to describe a fault phenomena whereby one or more of the drive bridge thyristors does not fire, causing distortion of the armature current waveform. Can lead to heating of the motor armature. Usually protected against by more sophisticated drives.
The complete or partial failure of a blasting charge to explode as planned.
[n] - an explosion that fails to occur 2. [v] - fail to fire or detonate
noun an explosion that fails to occur