Arrebato translates to "outburst," "impulse," or "fit." It's a powerful word that describes a sudden, intense, and often uncontrollable rush of emotion that makes you act.
In the lyrics, Shakira sings, "a esta loba le da el arrebato" (this she-wolf is overcome by an impulse). She uses this dramatic word to describe how, despite trying to be strong and move on, she's suddenly seized by an overwhelming feeling of passion for her ex, completely losing control.
Shakira teams up with Bizarrap again for "La Fuerte," which translates to "The Strong One." But is she really that strong? The song is all about that feeling after a breakup where you're trying to convince everyone, and maybe yourself, that you're totally fine. She's full of regret, wishing she had known their last time together was the end: "De haber sabido que iba a ser la última vez / Te hubiera gozado más" (If I'd known it was going to be the last time / I would have enjoyed you more). She admits that her pride is the only thing keeping her from reaching out, but she's definitely still hurting.
She gets into the details of trying to move on, and it's not going well. She sings, "Borré tu número, ¿y pa' qué? Si ya me lo sé" (I deleted your number, and for what? I already know it by heart). It's a perfect line about how pointless some gestures are when you can't get someone out of your head. She even gives a nod to her famous "She-Wolf" persona, saying "a esta loba le da el arrebato" (this she-wolf gets carried away). Despite pretending to be over it, she feels like a "leona enjaulada" (caged lioness) and is basically just waiting for him to call her back.