Apalabró comes from the verb apalabrar, which means to agree upon something verbally or to promise something. It's a less common word than acordar (to agree) or prometer (to promise), making it stand out.
In the song, the lyric "La felicidad que se apalabró" (The happiness that was promised/agreed upon) highlights a broken promise. The singer feels that the happiness they were verbally assured of never materialized, adding a layer of betrayal and disappointment to the narrative.
Have you ever been so heartbroken that you just want to tell your ex exactly how it is? That's the vibe of Los Dos Carnales' "No Estaré Aquí" [I Won't Be Here]. It's a powerful song about a love that went wrong, where one person is left picking up the pieces.
The singer looks back at the good times, like the first roses he gave and the first kiss he stole, remembering how his kisses used to