armlock - Wiktionary, the free dictionary

From arm +‎ lock.

armlock (plural armlocks)

1. A wrestling move in which the opponent's arm is held immobile.
2. Any of several distinct attacks against an opponent’s arm in martial arts.
3. (figuratively, by extension) Power to control or heavily influence something or someone.
   • 2012, The Economist, Sep 29th 2012 issue, Venezuela’s presidential election: The autocrat and the ballot box

     Mr Chávez remains a formidable opponent. […] He has an armlock on the country’s institutions.

armlock (third-person singular simple present armlocks, present participle armlocking, simple past and past participle armlocked)

1. (transitive) To hold in an armlock.

• lockram, marlock