oligarch

From Ancient Greek ὀλιγάρχης (oligárkhēs).
Surface analysis: olig- (“few”) +‎ -arch (“ruler, leader”)

• (US) IPA^(key): /ˈoʊlɪˌɡɑɹk/

oligarch (plural oligarchs)

1. A member of an oligarchy; someone who is part of a small group that runs a country.
2. (especially Russia, USA, Europe, or China) A very rich person, particularly with political power; a plutocrat.
   • 2016 December 6, Francis Fukuyama, “The Dangers of Disruption”, in The New York Times‎:

     He will be an oligarch in the Russian mold: a rich man who used his wealth to gain political power and who would use political power to enrich himself once in office.

   Synonyms: plutocrat, tycoonocrat

3. (cosmogony) A protoplanet formed during oligarchic accretion.

• oligarchic
• oligarchical
• oligarchy

• oligarch on Wikipedia.Wikipedia