Ahogues is from the verb ahogar, which literally means "to drown". It's a dramatic and powerful word that creates a strong visual image.
In the lyrics, Selena Gomez uses it metaphorically, singing "No me ahogues con palabras" (Don't drown me with words). She's expressing that her ex's attempts to talk to her are overwhelming and suffocating. This poetic phrase vividly captures the feeling of being emotionally overwhelmed and wanting someone's empty words to just stop.
In "Adiós," Selena Gomez is dealing with an ex who is sending some seriously mixed messages. His friends have told her he's moved on and that "tu vida va mejor sin mí" [your life is better without me]. But then he turns around and calls her late at night, asking who she's with. She calls him out directly: "Pero entonces, ¿por qué me reclamas?" [But then, why are you complaining to me?]. It's a classic case of someone saying one thing but doing the complete opposite.
Selena's response is a firm and final goodbye. She's not interested in the drama. The photo she posted online? "Adiós, esta no es pa' ti" [Goodbye, this isn't for you]. If he hears rumors she's with someone new, she confirms it's probably true: "Es probable que sí" [It's probable that yes]. She's moved on completely and tells him to stop bothering her, especially if she's already left his messages on read. The whole song is a clear message: she's done, and it's time for him to accept it.