Mordiendo comes from the verb morder, meaning "to bite". While "to bite" might seem simple, its use in this song is quite evocative and not literal.
The lyrics begin with "Sentís el sol mordiendo la piel" (You feel the sun biting your skin). This personification of the sun "biting" creates a vivid and somewhat intense image, suggesting a strong, almost aggressive sensation of the sun's heat. It's a more poetic and impactful way to describe the feeling than simply saying the sun is hot.
Bajofondo and Cristian Castro's "Se Fue El Sol" plunges us into the intense feeling of missing someone so much it hurts. The singer is desperate to reconnect, feeling the "sol mordiendo la piel" [sun biting the skin] and realizing their loved one's "ojos oscuros ya no me ven" [dark eyes no longer see me]. It's a race against time, with "me falta tiempo Para quemarme contigo otra vez" [I lack time To burn with you again] – a really vivid image for wanting to feel that passion once more.
As the sun sets and night falls, the feeling of loss deepens. The lyrics repeat, "Se fue el sol, la noche va Escondiendo todo acá" [The sun left, the night goes Hiding everything here], symbolizing how the darkness seems to swallow all hope and connection. The singer hears their voice "que se pierde lejos, lejos" [that gets lost far away, far away] and ultimately has to "dejo de soñar" [stop dreaming]. It's a beautiful, melancholic journey through longing and the painful acceptance of absence, even as they still yearn to "morder tus labios Aunque sea una vez más" [bite your lips Even one more time].