This is the 925th most frequent Portuguese word.
gratuito
Free of charge.
In this context, 'gratuito' indicates something unnecessary or unprovoked, showing a figurative usage.
Ele fez um comentário gratuito que ninguém entendeu.
He made an unnecessary comment that no one understood.
Here, 'gratuito' emphasizes that the gifts were provided without cost.
Recebi brindes gratuitos na exposição.
I received free gifts at the exhibition.
Here, 'gratuito' is used as an adjective to describe that the event does not require payment.