I. ˌmis-ˈf(-ə)r intransitive verb
Date: 1752
1. : to have the explosive or propulsive charge fail to ignite at the proper time
the engine misfired
2. : to fail to fire
the gun misfired
3. : to miss an intended effect or objective
the new ad campaign misfired
II. ˌmis-ˈfī(-ə)r, ˈmis-ˌ noun
Date: 1839
1. : a failure (as of a cartridge or firearm) to fire
2. : something that misfires