1. Rule or exercise power over somebody in a cruel and autocratic manner
   "her husband and mother-in-law tyrannise her";
   - tyrannize, domineer
    
2. Rule a country as a tyrant
   "The dictator tyrannised the population with oppressive laws";
   - tyrannize

Derived forms: tyrannising, tyrannises, tyrannised

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