Which word uses the greek root for chief or ruler

Answer: Autocrat. It comes from two Greek roots: autos, meaning “self,” and kratos, meaning “strength” or “power.” An autocrat is someone who rules himself or herself.

Answer:
The word “monarch” comes from the Greek word “monarchia”, meaning “rule by one”. It is used to describe a political system in which a single person has absolute power and authority.

Answer: magistrate.
From the Greek word, magistratus, meaning “chief, ruler, overseer”.