arbiter
noun [ C ] uk/ˈɑː.bɪ.tər/ us/ˈɑːr.bə.t̬ɚ/
仲裁人，公断人，裁决人；权威人士
someone who makes a judgment, solves an argument, or decides what will be done
the arbiters of fashion/taste 时尚／鉴赏权威
The government will be the final arbiter in the dispute. 政府将对争端作出最终裁决。