POTENTATE
Meaning of POTENTATE in English
po ‧ ten ‧ tate /ˈpəʊt ə nteɪt $ ˈpoʊ-/ BrE AmE noun [countable]
literary a ruler in the past, who had great power over his people
Longman Dictionary of Contemporary English.
Longman - Словарь современного английского языка.
2012