Eclipsabas comes from the verb eclipsar, meaning "to eclipse." It's an evocative and somewhat rare word in everyday conversation, making it stand out.
In the song, the lyric "Tú fuiste la de siempre, eclipsabas la luna" (You were always the one, you eclipsed the moon) uses this word metaphorically. It beautifully conveys how the person's presence was so overwhelming and captivating that it overshadowed even something as brilliant as the moon, highlighting their profound impact on the singer.
In "Diablo," Beret and Estopa paint a picture of a magnetic but painful relationship. The singer describes a woman who seems perfect to him, someone who once "eclipsed the moon" and with whom he connected so deeply they "read each other like literature." However, this connection is one-sided and full of turmoil. He feels completely under her control, as if she holds his heart "squeezed in her fist" and pulls him into her life whenever she pleases.
This woman is a complex figure. On the outside, she laughs, but on the inside, she's "screaming for help." This inner conflict makes her seem like "the devil" in his eyes, and he feels like someone "condemned to live in her lie." He sees himself as just "anyone" to her, someone who gives unconditionally while she remains distant. The song captures the feeling of being trapped in a passionate, yet destructive, love, where beautiful memories clash with the painful reality of unbalanced affection.