tributus
Tributus is a term used in historical, anthropological, and fictional contexts to denote a formal obligation of tribute or the payment itself. The word traces to Latin tribūtum, meaning tribute or tax; in authentic Latin, tribūtum is the noun for the payment, and tributārius or tributarius are related forms describing payers or subjects under tribute. The standalone form tributus appears mainly in later, specialized usages and in worldbuilding as a label for an obligation rather than a fixed historical name.
Historically, tributa were common in empires that practiced suzerainty. Subordinate polities paid periodic tributa in coin,
In modern writing and fictional contexts, tributus is often used as a formal tax system, a ceremonial
Related concepts include tribute, taxation, tributary state, and suzerainty.