soviet (n.)youdaoicibaDictYouDict[soviet 词源字典]
1917, from Russian sovet "governing council," literally "council," from Old Russian suvetu "assembly," from su "with" (from *su(n)- "with, together," from PIE *ksun- "with") + vetu "counsel." The whole is a loan-translation of Greek symboulion "council of advisers." As an adjective from 1918.[soviet etymology, soviet origin, 英语词源]