tributary
US /ˈtrɪb.jə.ter.i/
UK /ˈtrɪb.jə.ter.i/

1.
tributário, vassalo
paying tribute to another state or ruler
:
•
The smaller kingdom became tributary to the powerful empire.
O reino menor tornou-se tributário do poderoso império.
•
The conquered people were forced to pay tributary taxes.
Os povos conquistados foram forçados a pagar impostos tributários.