FEDERATION

- A [political] union by agreement; French fédération, Latin foederationem  [stem foederare = league

together, from foedus = covenant, league (cognate🔍  fides = trust,  faith, confidence, reliance,

credence, belief )]  [PIE🔍 root bheidh- = to trust, confide, persuade]

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   Related: FEDERAL - political sense; formed by agreement among independent state🔍 

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    Related: CONFEDERATE - unite in a league or alliance; Latin confoederatus, [com(n) = with, together ]​