This is the 1532nd most frequent Portuguese word.
gastar
To spend or use up.
In this sentence, 'gastar' is used to mean 'spend', referring to allocating one's free time to an activity.
Eu gosto de gastar meu tempo livre lendo livros.
I like to spend my free time reading books.
Here, 'gastar' is used to mean 'spend', specifically in the context of using money for transactions.
Ela não quer gastar dinheiro com coisas desnecessárias.
She does not want to spend money on unnecessary things.
In this context, 'gastar' is used to mean 'deplete' or 'wear out', referring to the consumption of resources or energy.