Regierender
Regierender is a noun form derived from the German verb regieren (to govern). In contemporary usage it appears primarily as part of formal titles to designate the person who leads a government. The most common combinations are Regierender Bürgermeister and Regierender Ministerpräsident. The word signals that the holder is the active ruler or governor of a state or city-state. Outside of such titles, Regierender is rarely used on its own.
Usage and contexts: In Germany, the best-known instance is the Regierender Bürgermeister of Berlin, the head
Grammar and nuance: Regierender is the masculine nominative singular form of the participle used as a noun.
See also: Government, Head of government, Ministerpräsident, Bürgermeister, Berlin.