In ancient rome, during times of turmoil, one leader with absolute power would be selected to rule temporarily. this leader was called a

dictator

marshal

chief

authoritarian

The correct answer is Dictator.

Marshal and Chief were not roman words or roman titles, while authoritarian was a type of rule. All dictators are authoritarian, but they aren't referred to as such. That's where the word Dictator comes from and its understanding in modern politics.