Treaty
来自Big Physics
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late Middle English: from Old French traite, from Latin tractatus ‘treatise’ (see tractate).
wiktionary
From Middle English trety, tretee, from Old French traitié, traieté, from Latin tractatus, from tracto.
etymonline
treaty (n.)
late 14c., "treatment, discussion," from Anglo-French treté, Old French traitié "assembly, agreement, dealings," from Latin tractatus "discussion, handling, management," from tractare "to handle, manage" (see treat (v.)). Sense of "contract or league between nations or sovereigns" is first recorded early 15c.
