A binding judgment or decision made by an arbiter; the power or act of determining a dispute through arbitration rather than court.
From Latin 'arbitramentum,' derived from 'arbiter.' The word was common in medieval and early modern English legal language but is now largely archaic, replaced by 'arbitration.'
Medieval knights would swear binding oaths to accept 'arbitrament' from a chosen judge, which meant they literally had to promise beforehand to accept whatever decision came—no appeals, no backsies!
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