Agonizando means "agonizing" or "in agony". It's a highly dramatic word that paints a vivid picture of intense suffering.
In the song, Luis Fonsi sings, "Estoy muriendo, muriendo por verte, agonizando" (I'm dying, dying to see you, agonizing). He uses this powerful verb to describe the extreme emotional pain of being separated from the one he loves. It elevates the feeling beyond simple sadness to a state of desperate, soul-crushing torment, making it a truly unforgettable word for expressing heartbreak.
Ever made a late-night phone call you swore you would not make? Puerto Rican star Luis Fonsi teams up with Rauw Alejandro to tell that exact story in "Vacío" (Empty). The song kicks off with someone breaking a strict promise after having a couple of drinks: "Después de par de tragos siempre me arrepiento" (After a couple of drinks I always regret it). He knows his ex is with someone new ("sé que estás con alguien" [I know you are with someone]), but he dials anyway because the silence at night feels freezing without her: "por la noche baby siento frío" (at night baby I feel cold).
Rauw Alejandro jumps in to make things even messier. He boldly claims that whenever her new partner kisses her, she only feels her ex's lips: "Cada beso que él te está dando / Solo los míos estás sintiendo" (Every kiss he is giving you / You are only feeling mine). That is a remarkably bold claim, especially since Rauw admits he has his own new partner too: "aunque estoy con ella / Me estoy muriendo por verte" (even though I am with her / I am dying to see you). Both singers are stuck replaying memories of clothes dropped on the floor ("Tu ropa en el piso" [Your clothes on the floor]), realizing that dating someone new does nothing to fix the lingering hollow feeling inside.