The phrase "tighten a noose around" is an idiom that means "to make a situation more difficult for someone" مشکل کردن شرایط برای کسی
As Hamas captured Gaza from rivals Fatah in 2007 ( after winning the Palestinian elections the year before ) Israel and Egypt tightened a noose around the enclave, which houses around 2 million people.
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The new tougher penalties will tighten the noose on traffic offenders.
They tightened the noose around the enemy by cutting the supply lines.
The rebels are tightening the noose around the capital.
