Castiga means 'punishes' or 'chastises'. It's a strong and somewhat dramatic verb that stands out in the lyrics, hinting at a sense of remorse or consequence.
In the song, the singer expresses a wish for karma to punish him, saying "Ojalá que el karma me castiga." This reveals a deep regret for his actions and the pain he caused, making it a powerful word that conveys the emotional weight of the song's theme.
This song, "No Quería Hacerte Llorar" by La Fiera De Ojinaga featuring Manuel Reza, is a really honest and almost brutally self-aware look at a breakup from the perspective of the person who messed up. The singer admits, "no era mi intención romper el corazón" [it wasn't my intention to break your heart], but he clearly did. He sees the sadness he caused, saying, "y esa cara triste o de la devesa mi" [and that sad face or yours].
He knows he's to blame and even says, "ojalá que el karma me castiga" [I hope karma punishes me]. It's a pretty blunt confession that he didn't know how to value the relationship, singing, "como no iba a pasar si nunca supe valorar" [how was it not going to happen if I never knew how to value it]. He even tells his ex to be happy because "un gran peso de encima te quitaste" [you took a big weight off your shoulders]. It’s a powerful song about regret and accepting responsibility for hurting someone you cared about.