This is the 768th most frequent Portuguese word.
inácio
"Inácio" is a Portuguese given name, equivalent to "Ignatius" in English.
Here, 'Inácio' is used as a proper noun indicating the name of a person.
O Inácio foi à escola muito cedo hoje.
Inácio went to school very early today.
In this case, 'inácio' is used metaphorically as an adjective to describe someone's behavior.
Ela disse que o comportamento dele é muito inácio.
She said that his behavior is very naive.
In this example, 'inácio' is figuratively referring to a boy, used perhaps regionally or informally.