Indolente translates to "indolent" or "apathetic". It's a less common word in everyday Spanish, making it stand out in the lyrics.
In the song, the singer declares, "No voy a volverme un maldito indolente" (I'm not going to become a damned indolent person). He uses this word to express his resolve not to become lazy or indifferent after his heartbreak, showing a strong emotional stance against giving up on life or love.
In "Después de Tu Adíos" [After Your Goodbye], Elder Dayán Díaz and Lucas Dangond bring us a song about picking yourself up after a tough breakup. Our singer is absolutely heartbroken, deciding to "ponerme el licor que jamás me he bebido" [drink the liquor I've never drunk] and "llorar tus canciones cien días seguidos" [cry to your songs for a hundred days straight]. It's a dramatic start, but he's got a plan.
After those hundred days of sadness, he's determined to forget his ex. He'll go "con mi orgullo a cantar a otra parte" [with my pride to sing somewhere else] where the "dolor deportivo" [sports pain] won't get to him. He talks about being with people he never imagined, even going to bed with someone he "jamás pensé" [never thought of], but without any real emotional connection. He's not going to risk his heart again, choosing to "condenarme a vivir en soledad" [condemn myself to live in solitude] or find someone who just wants to "acompañarme a solo estar" [accompany me just to be], someone who won't even "conjuga el verbo amar" [conjugate the verb 'to love']. It's a blunt, almost cynical take on love after heartbreak, but you can feel the pain behind his resolve.