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- arbitrary:  Arbitrary comes ultimately from Latin arbiter ‘judge’, via the derived adjective arbitrārius. It originally meant ‘decided by one’s own discretion or judgment’, and has since broadened, and ‘worsened’, in meaning to ‘capricious’. The Latin noun has of course contributed a large number of other words to English, including arbiter  itself, arbitrate  (via the Latin verb arbitrārī), and arbitrament . Arbitrage in the sense ‘buying and selling shares to make a profit’ is a 19thcentury borrowing from French, where it means literally ‘arbitration’.
- arbitrary (adj.)
- early 15c., "deciding by one's own discretion," from Old French arbitraire (14c.) or directly from Latin arbitrarius "depending on the will, uncertain," from arbiter (see arbiter). The original meaning gradually descended to "capricious" and "despotic" (1640s). Related: Arbitrarily; arbitrariness.
- 1. The choice of players for the team seemed completely arbitrary.
- 2. A good judge does not make arbitrary decisions.
- 3. You can make an arbitrary choice.
- 4. He makes unpredictable, arbitrary decisions.
- 他做的决定难以预料, 主观武断.
- 5. Arbitrary arrests and detention without trial were common.
[ arbitrary 造句 ]