dictatorial
adj.describing a leader or a system where one person has total power and makes all the rules. It can also describe someone who is very bossy and wants everyone to follow their orders.
adj.characterised by or resembling a dictatorship; exercising absolute power without legal or constitutional restraint. Often used to describe a person's manner or a system's structure.
“The leader's dictatorial style made it hard for others to speak up.”
“The new manager's dictatorial approach to scheduling caused a lot of tension among the staff.”
“The transition from a democratic government to a dictatorial regime was marked by the sudden suppression of independent media and the arrest of political opponents.”
From dictator + -ial.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.