This is the 12744th most frequent Portuguese word.
uruguaios
Uruguaios: Uruguayans; people from Uruguay.
In this instance, 'uruguaios' is possessively describing attributes (culture) that belong to the people from Uruguay.
A cultura dos uruguaios reflete sua rica história e tradições.
The culture of Uruguayans reflects their rich history and traditions.
In this sentence, 'uruguaios' is used as a noun to refer to the people of Uruguay collectively.
Os uruguaios são conhecidos por sua paixão pelo futebol.
Uruguayans are known for their passion for football.
Here, 'uruguaios' is used as a noun specifically identifying individuals from Uruguay encountered in a specific context.