stranglehold - definition and synonyms

noun [countable] 

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/ˈstræŋɡ(ə)lˌhəʊld/
singularstranglehold
pluralstrangleholds
  1. 1
    strong power over someone or something that prevents them from having any freedom to act
    stranglehold on:

    Government forces have tightened their stranglehold on the region.