WordWeb Online

1. Rule a country as a tyrant
   - tyrannize, grind down
    
2. Rule or exercise power over (somebody) in a cruel and autocratic manner
   "her husband and mother-in-law tyrannise her";
   - tyrannize, domineer

Derived forms: tyrannised, tyrannises, tyrannising

Type of: ballyrag [N. Amer, informal], boss, boss around [informal], browbeat, bully, bullyrag [N. Amer, informal], dictate, hector, push about [informal], push around [informal], strong-arm