suzerainty
noun [ U ] politics specialized uk/ˈsuː.zər.eɪn.ti/ us/ˈsuː.zɚ.ɪn.ti/
领主地位，宗主权
the right of a country to partly control another
Japan acknowledged Russian suzerainty over the island of Sakhalin. 日本承认俄罗斯对库页岛拥有宗主权。
See also: suzerain