Adentros literally means "inside" or "inward parts," but in this context, it refers to one's innermost being or the depths of their soul. It's a more poetic and profound way to express deep feelings than simply saying "inside."
In the song, the lyric "Saqué de mis adentros lo que ahí crecía" (I took from my innermost being what was growing there) beautifully conveys the intensity of the singer's emotions and the profound love that originated from the deepest part of himself.
Enanitos Verdes really hit us in the feels with "Y Ahora Te Vas"! This song is all about a love that just didn't work out, even though the singer gave it their all. They talk about giving "todo, todo de mi vida" [everything, everything of my life] and how an "obsesión inmensa por hacerte mía" [immense obsession to make you mine] grew inside them.
It's that classic bittersweet feeling of knowing you fought hard, even risking "hasta la última gota del llanto" [until the last drop of tears], but it wasn't enough. The singer is left wondering, "A quién le darás todo lo que no me diste a mí" [To whom will you give everything you didn't give me?] and "Quién llorará por ti como yo algún día" [Who will cry for you like I will someday?]. It's a powerful and relatable song about unrequited love and the pain of watching someone walk away after you've poured your heart out.