a mechanism that detonates the charge of a gun(noun.artifact)
source: wordnet30
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(noun.artifact)
any wrestling hold in which some part of the opponent's body is twisted or pressured(noun.act)
source: wordnet30
A tuft of hair; a flock or small quantity of wool, hay, or other like substance; a tress or ringlet of hair.(noun)
source: webster1913
Anything that fastens; specifically, a fastening, as for a door, a lid, a trunk, a drawer, and the like, in which a bolt is moved by a key so as to hold or to release the thing fastened.(noun)