This is the 3105th most frequent Portuguese word.
bandeira
"Flag."
In this sentence, 'bandeira' is used in its primary meaning to denote a national flag.
A bandeira do Brasil é verde, amarela, azul e branca.
The flag of Brazil is green, yellow, blue, and white.
Here, 'bandeira' is used metaphorically to represent an idea or cause, symbolized as a flag.
Ele levantou a bandeira da paz durante o protesto.
He raised the flag of peace during the protest.
In this context, 'bandeira' refers to a banner or emblem representing a group, such as a sports team.