Trapecista literally means "trapeze artist." It's a fantastic and uncommon word that paints a vivid picture of a circus performer.
In the song, Enrique Iglesias uses this word as a powerful metaphor. He sings, "jugaste al trapecista y sin red" (you played the trapeze artist and without a net), to describe a lover who took a huge, reckless risk in a relationship and ended up getting hurt. This dramatic imagery makes it a very memorable and poetic word to learn.
Have you ever taken a huge risk for love? In this song, Enrique Iglesias uses a powerful metaphor for that exact feeling. He compares a woman he cares for to a circus performer, singing, "Loca, jugaste al trapecista y sin red" (Crazy girl, you played the trapeze artist without a net). She took a dangerous leap in a relationship and got badly hurt, showing up at his door trembling and seeking peace after someone has done her wrong.
The narrator is the person she turns to for comfort. He had warned her against this, saying "No saltes, te advertí" (Don't jump, I warned you). But now that she's fallen, he's there to take care of her, holding her hand and comforting her. The song's main idea is that this is just how love works. It's a risk we all have to take, and sometimes we fall. As he puts it, it's the "ley de vida / Y amar es al fin caer" (law of life / And to love is, in the end, to fall).