keylock

Short definition from Wiktionary

Noun

1. 1
   An armlock where the implementer isolates the opponent's arm and torques the shoulder in order to cause pain or injury.
2. 2
   A physical lock on the case of a computer, preventing use of the keyboard until unlocked.
3. 3
   A digital feature used by disc jockeys that locks a track to its original key regardless of changes made to the tempo.

Proper noun

1. 1
   A surname.