oligarch

n member of an oligarchy(1) 寡头政治家; 寡头统治集团成员.

old man, old man's beard, old master, old school, old stager, old sweat, old woman, old-fashioned, old-maidish, old-time, old-timer, old-world, olden, oldie, oldish, oldster, oleaginous, oleander, olfaction, olfactory, oligarchy, olive, olive oil, olive-branch, Olympiad, Olympian, Olympic, Olympic Games, Olympics, OM, ombudsman, omega, omelet, omelette (also omelet), omen, ominous, ominously, omission, omit, omni-,