Embrujo translates to "spell" or "bewitchment," a word used to describe a magical charm or enchantment cast upon someone.
In this song, Juanes uses this powerful word to describe the intoxicating and irresistible hold his lover had over him. He sings that his deep sorrow is the fault of her embrujo, painting a vivid picture of a love that was both magical and destructive.
Colombian rocker Juanes turns heartbreak into a punchy, darkly funny anthem with "La Camisa Negra". Instead of crying quietly in a corner, he throws on a black shirt as literal mourning wear for a dead romance: "Tengo la camisa negra / Hoy mi amor está de luto" (I have the black shirt / Today my love is in mourning). He blames the whole mess on the ex's toxic spell, saying he drank "del veneno malevo de tu amor" (from the evil poison of your love) and breathed in the bitter smoke of her goodbye. It leaves his soul pitch-black, his calm shattered, and his packed bags sitting by the door on a lonely Wednesday afternoon.
What makes the track so catchy is how Juanes mixes bitter drama with cheeky local wordplay. When he sings "Lo que ayer me supo a gloria / Hoy me sabe a pura... Miércoles" (What tasted like heaven yesterday / Today tastes like pure... Wednesday), he pulls off a classic Latin trick called calambur. He cuts off the sentence right where you expect a vulgar swear word starting with "mier-" and replaces it with Miércoles (Wednesday) at the start of the next line. Add in his cheeky, deadpan joke that "debajo tengo el difunto" (underneath I have the dead body), and you get a breakup track that is bitter, dramatic, and impossible not to dance to.