potentate
noun /ˈpəʊtnteɪt/
/ˈpəʊtnteɪt/
(literary, often disapproving)- a political leader who has a lot of power, especially when this is not limited by a parliament, etc.
权力大的统治者；（尤指不受国会等约束的）君主，统治者 词源late Middle English: from Latin potentatus ‘dominion’, from potent- ‘being able or powerful’, from the verb posse.