noose 
/ˈnu:s/ noun
plural noos·es /ˈnu:s/ noun [count] : a large loop at the end of a rope that gets smaller when you pull the rope and that is used to hang people, to capture animals, etc.
▪ the hangman's noose
▪ the hangman's noose
tighten the noose
: to make a situation more difficult for someone
▪ The new tougher penalties will tighten the noose on traffic offenders. ▪ They tightened the noose around the enemy by cutting the supply lines.
▪ The new tougher penalties will tighten the noose on traffic offenders. ▪ They tightened the noose around the enemy by cutting the supply lines.
