Flaqueza translates to "weakness" or "frailty." It's a less common word than "debilidad" for weakness, making it stand out.
In the song, the line "Y saldrá de nuestra flaqueza, energía que no teníamos" (And from our weakness will come energy we didn't have) suggests a powerful transformation. It implies that strength and resilience can emerge from vulnerability, giving the word a profound and inspiring context within the lyrics.
Zahara opens "Caída Libre" ("Free Fall") by lowering the stakes: "No será el glamour de nuestros peinados" ("It will not be the glamour of our hairstyles") — then raises them again, promising "estaremos dispuestas a coger nuestro trozo de pastel" ("we will be willing to take our piece of the cake"). The song is a dare to outlast exhaustion: "No pararemos a dormir, bailarás mi rubia para mí" ("We will not stop to sleep, you will dance my blonde for me"), with a nod to Madonna mid-verse — "Voy a sacarte a bailar 'Like a virgin'".
Between sunrise and secrets traded over "sus secretos de cocina y del vivir" ("their secrets of cooking and living"), Zahara lands on the title itself: "Y es la caída más limpia del mundo... Caída libre" ("And it's the cleanest fall in the world... Free fall") — falling not as failure, but as release.