Arbitrary
来自Big Physics
late Middle English (in the sense ‘dependent on one's will or pleasure, discretionary’): from Latin arbitrarius, from arbiter ‘judge, supreme ruler’, perhaps influenced by French arbitraire .
wiktionary
From Middle English arbitrarie, Latin arbitrārius(“arbitrary, uncertain”), from arbiter(“witness, on-looker, listener, judge, overseer”).
etymonline
arbitrary (adj.)
c. 1400, "deciding by one's own discretion, depending on one's judgment," from Latin arbitrarius "of arbitration," hence "depending on the will, uncertain," from arbiter (see arbiter). The meaning in English gradually descended to "capricious, ungoverned by reason or rule, despotic" (1640s). Related: Arbitrarily; arbitrariness.
