imperiousness       
noun [ U ] uk/ɪmˈpɪə.ri.əs.nəs/ us/ɪmˈpɪr.i.əs.nəs/
 专横,跋扈
behaviour that is unpleasantly proud and shows that the person expects to be obeyed
  He developed a reputation for imperiousness and grandiosity. 他以专横和自大而闻名。 
 Underneath the imperiousness he was a decent person. 尽管显得傲慢,他是一个正派的人。 
 See: imperious
 - More examples
 - She has the imperiousness of a rich Texan.
 - Beneath her imperiousness was an artist wanting to be valued.
 - He developed a reputation for imperiousness and grandiosity.