strong-arm

/S T R AO1 NG AA0 R M/
noun
  1. 1

    A person who threatens or intimidates others, especially on behalf of somebody else; a goon or enforcer.

verb
  1. 1

    To bully; to intimidate.

  2. 2

    To coerce, to muscle.

adjective
  1. 1

    Bullying; extortionate.

  2. 2

    (usually figurative) Coercive, employing force.

Source: https://en.wiktionary.org/wiki/strong-arm