oligarchal
[ɒlɪˈɡɑːrkəl]
Definitions
1. adjective
relating to or characteristic of an oligarchy, especially in being dominated by a small group of powerful individuals or families
“The oligarchal system was criticized for its lack of transparency and accountability.”
2. noun
a person who belongs to or supports an oligarchy, especially one of a small group of powerful individuals or families
“The oligarchs in the city used their wealth and influence to control the local government.”