stranglehold

noun

1. A grip or control so strong as to stifle or cut off.

   “For years the company had a stranglehold on the rest of the industry.”

   “Numerous witnesses had come forward at that time to state that they had watched Kelly tackle Symaco and pin her on the floor in a strangle-hold until investigating officers arrived to pry him loose.”

   “That record felt like ancient history as the Djokovic of 2011 overcame a slightly edgy start to take a stranglehold on the match.”

verb

1. (transitive)To hold a tight grip or control.

   “"She does not hold a partner; she strangleholds him. As soon as a man realizes how tightly she holds on, he leaves her."”