arena

n.竞技场

architectural, architecture, archive, archives, archivist, archway, Arctic, Arctic Circle, ardent, ardently, ardor, ardour (US ardor), arduous, arduously, are, area, area code (US) dialling code, areca, areca nut (also betel-nut), aren't, arete, argon, argot, arguable, arguably, argue, argument, argumentation, argumentative, argumentatively, argy-bargy, aria, arid, aridity, aridly, aridness, Aries, aright, arise, arisen,