The practice or office of an arbitrator; arbitration or the power to make judgments.
From Old French arbitrie, derived from arbitre (arbitrator). The suffix -ry (or -ery) creates nouns describing a practice, place, or set of qualities, as in archery, witchery, and slavery.
The -ry suffix is interesting because it's often used to describe specialized practices or crafts: carpentry, masonry, archery. It gives the sense of something that requires skill, judgment, or special knowledge—which is exactly what arbitry does.
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