Desierto literally means "desert". While it's a common word, its use in this song is particularly evocative and metaphorical.
The artist sings, "a este desierto le quiero pedir volver a ver tu sonrisa" (I want to ask this desert to see your smile again). Here, "desierto" isn't just a dry, barren land; it represents the singer's emotional state—a place of emptiness and longing without the person he misses. He's asking this desolate feeling, or perhaps the desolate world around him, for a sign of hope, making it a powerful image of his yearning.
Have you ever just really wanted to see someone again, but they keep disappearing on you? That's exactly what Kid Flex, Kaeve, and Diego Palace are singing about in "Te Escondes"! The song kicks off with the singer hearing rumors that their lost love has been seen around, making them realize how much they miss them. They're left with just memories, wondering why this person is hiding.
The lyrics are all about this intense longing: "Hace rato que te quiero ver, ya te dije todas las razones pero te escondes y no sé dónde" [I've wanted to see you for a while now, I've told you all the reasons but you hide and I don't know where]. The singer is confused and a little frustrated, asking "no entiendo por qué tú ya no me quieres ver" [I don't understand why you don't want to see me anymore]. They even confess that if this person came back, they'd give them their best. It's a sweet, almost desperate plea to reconnect with someone who was clearly very special, not just "una más" [one more].