ar ad-と同じ接頭辞で、行く、向かう。root bain, with root ven, to go, -t, 過去分詞格, acrobatを参照のこと。
英語の語源
arbiter (n.)
late 14c., from Old French arbitre or directly from Latin arbiter "one who goes somewhere (as witness or judge)," in classical Latin used of spectators and eye-witnesses, in law, "he who hears and decides a case, a judge, umpire, mediator;" from ad- "to" (see ad-) + baetere "to come, go." The specific sense of "one chosen by two disputing parties to decide the matter" is from 1540s. The earliest form of the word attested in English is the fem. noun arbitress (mid-14c.) "a woman who settles disputes."
例文
1. He was the ultimate arbiter on both theological and political matters.
彼は神学的にも政治的にも最終的な仲裁人である。
2.The law is the final arbiter of what is considered obscene.