solidarity (n.)youdaoicibaDictYouDict[solidarity 词源字典]
1829, from French solidarité "communion of interests and responsibilities, mutual responsibility," a coinage of the "Encyclopédie" (1765), from solidaire "interdependent, complete, entire," from solide (see solid (adj.)). With a capital S-, the name of an independent trade union movement in Poland, formed September 1980, from Polish Solidarność.[solidarity etymology, solidarity origin, 英语词源]