arbiter [ˈɑ:bɪtə(r)]

以下由轻松背单词网站提供

n.仲裁人，公断人

someone who makes a judgment or solves an argument or decides what will be done

Andrew was the arbiter of the disagreement. 安德鲁是那场纠纷的仲裁人。
Experiment is the final arbiter in science. 实验是科学的最后仲裁者。