Bostezas means "you yawn" (from the verb bostezar). It's an unexpected and vivid word to find in a song about a dying relationship.
In the lyrics, the singer laments, "Pero mientras lo ves morir solo bostezas" (But while you watch it die, you only yawn). This powerful imagery conveys a profound sense of indifference and apathy from the partner, making the word both memorable and emotionally charged in the context of heartbreak.
This song, "Nada [Acustico]" by Cali Y El Dandee featuring Danna Paola, is a powerful duet about the bitter end of a relationship. It's a back-and-forth between two people who are both hurt, but each blames the other for the breakup.
The song starts with one person feeling completely used, singing, "Si yo te di todo y me diste nada / ¿Por qué de la nada vuelves a aparecer?" [If I gave you everything and you gave me nothing / Why do you suddenly reappear?]. They remember crying in silence and almost drowning in tears. But then the other person jumps in, saying, "No te dejé sola, nos dejaste tú" [I didn't leave you alone, you left us]. They accuse their ex of lying and even say, "hoy me huele a engaño hasta tu perfume" [today even your perfume smells like deceit to me]. It's a really intense conversation, full of accusations and the pain of a love that's clearly over, with both sides saying, "fue tu culpa, tú me dejaste sola" [it was your fault, you left me alone].