Arañando comes from the verb arañar, which means 'to scratch'. It's a vivid and somewhat raw word that you don't encounter in every Spanish song, making it memorable.
In the context of the song, Pablo Alborán sings about "mis manos temblorosas arañando el colchón" (my trembling hands scratching the mattress). This powerful image conveys intense emotion—perhaps desperation, frustration, or anguish—after a heartbreak, making the word deeply evocative and intriguing.
This song is a classic, dramatic breakup anthem. Pablo Alboran is speaking directly to an ex who has just cheated on him, and he is not holding back. He starts by telling her, "No te atrevas a decir te quiero" (Don't you dare say 'I love you'), making it clear that any apologies are too little, too late. The pain is so intense that he says a single look from her is enough "Para matarme y mandarme al infierno" (To kill me and send me to hell). It's over the top, but that's what a bad breakup feels like!
Throughout the song, he asks the big question: "¿Quién?" (Who?). Who will help him see the sun again without this pain? Who will put up with him and his bad mood? He describes the relationship as an "obsesión" (obsession) and gives us this incredible, physical image of his distress: "mis manos temblorosas arañando el colchón" (my trembling hands scratching the mattress). Despite all the anger, he admits his biggest fear is being alone. He tries to sound tough, saying he'll settle for never seeing her again, but in the very next line, he confesses, "Si te digo la verdad no quiero verme solo" (If I tell you the truth, I don't want to be alone).