bayonet

Short definition from Wiktionary

Noun

1. 1
   A blade mounted to the end of a long gun, originally with a handle inserted into the bore, now usually attached underbarrel.
2. 2
   A pin which plays in and out of holes made to receive it, and which thus serves to engage or disengage parts of the machinery.

Verb

1. 1
   To stab with a bayonet.
2. 2
   To compel or drive by the bayonet.