Traición translates to "betrayal". It's a strong and emotionally charged word that carries significant weight, making it memorable and impactful.
In the context of "Libre Otra Vez", the singer explicitly states, "Pero siempre te dije que no Soportaría una traición" (But I always told you that I wouldn't tolerate a betrayal). This word is central to the song's theme of a relationship ending due to infidelity or a deep breach of trust, highlighting the reason for the narrator's newfound freedom.
"Libre Otra Vez" is a closing statement, not a plea. Over a banda arrangement, the singer tells an ex-partner to remember every word he's about to say -- "Acuerdate muy bien de todas mis palabras" [Remember very well all my words] -- because he isn't asking for anything back. He names the exact trade he made once the relationship ended: "Porque ya te olvide" [because I already forgot you], and reminds her he stayed quiet through a betrayal he never had to accept: "Pero siempre te dije que no" [But I always told you no].
The chorus turns the goodbye into a release for both of them, repeating "Que seas libre otra vez" [may you be free again] like a line he wants to make sure lands. The song runs its verses through twice almost unchanged, less like a wound being reopened than like a man rehearsing a speech he has already decided to give.