Dominar means 'to dominate' or 'to control'. While it can refer to physical control, in this song, it's used in a more emotional and psychological sense.
The singer repeatedly expresses regret, saying, "Perdón por no dominar mi pasión" (Forgive me for not controlling my passion). This reveals a struggle with self-control and intense emotions, making it a key word for understanding the song's theme of remorse and the consequences of uncontrolled feelings.
Alexander Acha's "Perdón" is a heartfelt apology from someone who knows they messed up badly. He admits, "sé que falle, que te ofendí" [I know I failed, that I offended you], and that he said things he didn't mean. He insists that "todo es mentira" [everything is a lie] when it comes to those hurtful words.
He's really struggling with his own actions, saying, "es por mí, es algo, no puedo, duele" [it's because of me, it's something, I can't, it hurts]. He asks for forgiveness for causing so much trouble, repeating "perdón por tantas molestias" [sorry for so much trouble]. The singer confesses that he couldn't control his passion, "por no dominar la pasión," and that fear of losing the other person made him react violently: "por miedo a perderte reaccionar así violento." He even says, "puedo hacer cualquier locura por ti" [I can do anything crazy for you], showing just how desperate he is to make things right. It's a powerful plea for a second chance, full of regret and a deep love.