Noun

1. misfire, dud, breakdown, equipment failure

usage: an explosion that fails to occur

2. miss, misfire, failure

usage: a failure to hit (or meet or find etc)

Verb

1. misfire, fail, go bad, give way, die, give out, conk out, go, break, break down

usage: fail to fire or detonate; "The guns misfired"

See also: misfire (Dictionary)