noose 
(ns)
(ns)n.
1. A loop formed in a rope by means of a slipknot so that it binds tighter as the rope is pulled. Also called running noose.
2. A snare or trap.
tr.v. noosed, noos·ing, noos·es
1. To capture or hold by or as if by a noose.
2. To make a noose of or in.
[Middle English nose, probably from Old French nos, nous, knot, from Latin nōdus; see NODE.]