federation
n.
1721, "union by agreement," from French fédération, from Late Latin foederationem (nominative foederatio), noun of action from Latin foederare "league together," from foedus "covenant, league" (see federal).
〔李〕[feder;-ationn.] n.同盟，联邦 ←feder (L foedus,foederis)=treaty, league 信约
〔蒋〕[feder联盟，-ation名词后缀] 聪明，同盟，联合会，联邦政府