treaty
https://gyazo.com/a5f1a6f4eab39c8cbdbc71d675bd4141
source: By Benjamin West - http://www.nccsc.net/archives/poetry/poems/treaty-paris-1783, Public Domain
noun (plural treaties)
a formally concluded and ratified agreement between countries.
«国家などとの/…に関する» 条約, 協定, 協約; 条約協定文書 «with/on» (→ convention)
ORIGIN
late Middle English: from Old French traite, from Latin tractatus ‘treatise’ (see tractate).