Marchita means "wilts" or "fades", a poetic word often used to describe flowers losing their freshness and beauty.
In the song, the singer describes a past love as "una rosa que no floreció, pero que el tiempo no la marchita" (a rose that didn't bloom, but that time does not wilt). This beautiful metaphor captures the idea of a memory so powerful that it remains vivid and unfaded, even after a long time has passed.
This song is all about a memory you just can't shake. The singer is haunted by a past love, and it’s the little things that bring it all back. A specific scent, “Un olor a tabaco y Chanel” (A smell of tobacco and Chanel), reminds him of her skin. The taste of “una mezcla de miel y café” (a mix of honey and coffee) brings back her kisses. It’s like his senses are stuck in the past, constantly asking him where she went.
He feels like the whole universe is in on it, too. Even “las estrellas” (the stars) are telling him to go back to her. But here's the twist: he says those same stars are what separated them in the first place, describing their relationship as “Una rosa que no floreció” (A rose that didn't bloom). It’s a love that never got a chance to fully happen, which is maybe why he can’t forget it. The song leaves him stuck, with time moving on but his thoughts always returning to her.