lock
noun
1.
2.
a strand or cluster of hair
3.
a mechanism that detonates the charge of a gun
4.
enclosure consisting of a section of canal that can be closed to control the water level; used to raise or lower vessels that pass through it
Derived from:
lock 5.
a restraint incorporated into the ignition switch to prevent the use of a vehicle by persons who do not have the key
6.
any wrestling hold in which some part of the opponent's body is twisted or pressured
Derived from:
lock