Aniquila comes from the verb aniquilar, meaning to annihilate or destroy. It's a strong and dramatic word that isn't used in everyday conversation, making it stand out.
In the song, the narrator boasts to his friends, "Que en el amor ninguna pena me aniquila" (That in love, no sorrow annihilates me). This powerful word choice highlights his attempt to project an image of invincibility in love, despite his true feelings of heartbreak.
Have you ever pretended to be over someone, even though you're totally not? That's exactly what's happening in Los Tigres Del Norte's "Acá Entre Nos" (Just Between Us). The singer is out with his friends, bragging about how he's completely forgotten his ex. He tells them he's found new love, and even that he hates her for her betrayal, sometimes wishing her dead! He even claims that a few shots of tequila were enough to erase her memory.
But then, the song takes a turn. He admits, "Acá entre nos, quiero que sepas la verdad, no te he dejado de adorar" (Just between us, I want you to know the truth, I haven't stopped adoring you). All that bravado was just for show. In his lonely moments, he feels like screaming, running to find her, and confessing that he can't stand it anymore. He's "odiando sin odiar, porque respiro por la herida" (hating without hating, because I breathe through the wound). It's a powerful and relatable song about the pain of a breakup and the struggle to move on, even when you try to convince everyone (and yourself) that you have.