strong-arm

Short definition from Wiktionary

Verb

1. 1
   To bully, to intimidate; to coerce, to muscle.

Noun

1. 1
   A person who threatens or intimidates others, especially on behalf of somebody else; a goon or enforcer.

Adjective

1. 1
   Bullying; extortionate.
2. 2
   Coercive, employing force.
3. 3
   Alternative form of strong-arm.