This is the 1777th most frequent Portuguese word.
gratuitas
"Gratuitas" means "free" or "free of charge" in English.
In this sentence, 'gratuitas' is used as an adjective, describing the noun 'aulas' (classes) to indicate that they are free of charge.
As aulas são gratuitas para os estudantes.
The classes are free for the students.
Here, 'gratuitas' modifies the noun 'amostras' (samples), specifying that they are provided without any cost.
Oferecemos amostras gratuitas dos produtos.
We offer free samples of the products.
In this example, 'gratuitos' (the masculine form of 'gratuitas') describes 'eventos culturais' (cultural events), denoting that there is no charge to attend.