Calibre literally translates to "caliber," often referring to the diameter of a bullet or gun barrel. It's an interesting word because it's not commonly found in romantic or emotional songs.
In this song, Humbe uses it metaphorically in the line, "Que en el mundo no haya calibre de bala que pueda vencernos" (May there be no bullet caliber in the world that can defeat us). He's expressing a desire for an unbreakable, eternal love that no external force, no matter how powerful or destructive, can overcome.
In "TSQ," Humbe explores the raw and confusing aftermath of a breakup. The singer is brutally honest, admitting, "¿Para qué te miento? Sí, te extraño" ("Why would I lie to you? Yes, I miss you"). They're lost, unable to understand why the relationship ended, especially since they feel they did nothing wrong. The idea of being just friends is impossible because the love is still there: "Pero sigo creyendo que no somos amigos cercanos / Pues yo sí te sigo queriendo" ("But I still believe we are not close friends / Because I do still love you"). This unreturned love creates a personal torment, a feeling that their soul is creating its own "infierno" (hell).
The song dives deep into the fantasy of what could have been. The singer imagines their love is eternal and so powerful that no "calibre de bala" (caliber of bullet) could defeat them. They dream of waking up next to their lost love, calling it a "privilegio" (privilege). Yet, the pain of reality keeps breaking through. The singer questions what hurts more: thinking of the person or remembering they're gone. It feels like a cruel twist of fate, as if life itself is preventing them from being together, making it difficult to love without getting hurt.