Peremptory

1. adjective

   offensively self-assured or given to exercising usually unwarranted power

   “an autocratic person”

   Similar: autocratic, bossy, dominating, magisterial

2. adjective

   putting an end to all debate or action

   “a peremptory decree”

3. adjective

   not allowing contradiction or refusal

   “spoke in peremptory tones”