Invencible means "invincible". This powerful word is easy for English speakers to recognize, but its use here is deeply emotional.
In the song, Maluma sings "Contigo me sentía invencible" (With you, I felt invincible). He's not talking about being a superhero, but about how love made him feel strong enough to conquer anything. The word perfectly captures the heartbreaking contrast between the power he felt in the relationship and the weakness he feels now that it's over.
This song is a total heartbreaker from two of Colombia's biggest stars, Maluma and KAROL G. It's all about the shock and pain right after a breakup. Maluma's character just can't accept that it's over. He's literally asking how he can explain to his own body parts—his heart, his eyes, his mouth—that his ex is gone forever. He pleads, "Créeme un poco más / Te lo suplico" (Believe me a little more / I beg you), feeling like the breakup is a punishment he doesn't deserve.
He feels lost and confused, calling himself "un loco más / Que no ha entendido" (just another crazy guy / who hasn't understood). He thought everything was perfect, saying she left at the best moment and that their love was real. KAROL G's part adds another layer, admitting she knew the relationship was becoming monotonous and that he would eventually leave. It's a classic reggaeton drama about two people who still have feelings but can't make it work, leaving him begging for just one more chance.