Matrimônio translates to "matrimony" or "marriage". It's a formal and significant word that stands out in the lyrics, especially given the song's theme of a wedding.
While the song describes a wedding, there's a twist: the singer laments that the marriage isn't his own. He sings, "o matrimônio quer Aprazível eu tô Te convidado" (the matrimony wants pleasant, I'm inviting you), implying a desire for his own happy union, contrasting with the current scene where he's just an observer. This makes the word central to the song's emotional core.
Imagine being at a wedding, but it's not a happy occasion for you. In "Marcha De Núpcias," which means "Wedding March," Thiago Aquino sings from the perspective of someone watching the person they love marry someone else. He describes the scene in painful detail: the church doors opening, the guests crying, and the bride with her parents.
While everyone else is celebrating, the singer is suffering in silence. He describes his nervousness and high blood pressure as the "symptoms of someone who loves." The core of his pain is the feeling that this is all a mistake. He sings, "era para eu aí do seu lado" ("it was supposed to be me there by your side"). Instead of a happy ending, he is left to suffer quietly, forever marked by this moment.