vassal
/ˈvæsəl/noun
1- historical a holder of land by feudal tenure on conditions of homage and allegiance〈史〉（封建时代）封臣; 臣属。
1.1
- a person or country in a subordinate position to another家臣; 仆人; 属国, 附庸国：
as modifier a vassal state of the Chinese empire中华帝国的附庸国。
派生词
vassalage
noun词源
late Middle English: via Old French from medieval Latin vassallus 'retainer', of Celtic origin; compare with VAVASOUR.