vassal

1. N-COUNT In feudal society, a vassal was a man who gave military service to a lord, in return for which he was protected by the lord and received land to live on. 封臣

2. N-COUNT If you say that one country is a vassal of another, you mean that it is controlled by it. 附庸國[書麪] [usu sing]

Opponents of the treaty argue that monetary union will turn France into a vassal of Germany. 協定的反對者認爲貨幣聯盟會使法國淪爲德國的附庸國。