Impuro means "impure". It's a powerful word that captures the song's central theme of mixing the sacred and the profane in passion.
Rosalía sings, "Impuro lo bendeci'o" (The impure, that which is blessed). She is asking her lover to transform something traditionally seen as sinful into a holy experience through their intense love. This beautiful contrast highlights a passion that is so powerful it redefines all the rules.
Rosalía gets intense and possessive in this song, and it's amazing. She's describing a secret, private world with a lover, demanding that whatever they say to each other stays behind closed doors: "Que las cosas que hoy me dices / No salgan por esa puerta" (That the things you tell me today / Don't leave through that door). This isn't just about keeping secrets; it's about creating a space where the normal rules don't apply.
She uses some wild imagery to get this point across. She asks her lover to "átame con tu cabello / A la esquina de tu cama" (tie me with your hair / to the corner of your bed). But then she admits that even if the hair breaks, she'll pretend she's still tied up. It's a game of power and desire where she is a willing participant. The song mixes the sacred and the profane, asking her lover to "haz que lo malo sea bueno / Impuro lo bendeci'o" (make what's bad good / the impure blessed). The final, repeated demand is simple but powerful: in their most intimate moment, he must look at her and say her name.