oligarch
n.
c.1600, from Middle French olygarche, oligarque, from Greek oligarkhes, related to oligarkhia (see oligarchy).
〔李〕n.寡头政治的执政者 [-arch=chief or ruler] ←olig（o）-[GK] =few少，缺
〔李〕[olig-=few少，寡；arch=ruler统治者→“one of a few rulers少数统治者之一”→] n. member of an oligarchy寡头统治成员