Forzar means 'to force' or 'to compel'. It's a powerful verb that implies using strength or will to make something happen against resistance.
In the song, Shakira sings about being willing to "Forzar el destino" (Force destiny) for her love. This dramatic phrase shows the depth of her passion, suggesting she would even fight against fate itself to not lose the person she loves.
Colombian superstar Shakira leans straight into romantic self-sabotage here, and she does not make excuses for it. The core joke of the track is right in the title: "Nunca me acuerdo de olvidarte" ("I never remember to forget you"). She tells us upfront that she is about to repeat yesterday's blunder ("el mismo error de ayer"). She even repurposes classic Spanish proverbs to call herself out, reminding us that "no hay ciego peor / que el que no quiere ver" ("there is no worse blind person than the one who doesn't want to see") and "no hay sordo peor / que el que no quiere oír" ("there is no worse deaf person than the one who doesn't want to hear"). In English, we say "none so blind as those who will not see," and Shakira uses it to admit she knows better, yet jumps off the train and falls into the net anyway ("Salto del tren / Caigo en tu red").
Things get dramatic fast when she lists the absurd lengths she would go to keep this doomed flame alive. She claims she would lie, die, or even force destiny off course ("Forzar el destino, perder el camino" [Force destiny, lose my path]) rather than let go. Friends offer sensible advice, telling her another lover will show up to treat her better ("Que habrá otro en mi vida / Que me quiera más y mejor"). Does she listen? Absolutely not. Instead, she happily crowns herself the biggest fool in the room ("no hay nadie más idiota / Aquí que yo" [there is no one more idiotic here than me]) because craving that person's mouth ("Muero por tu boca en la boca mía") wipes out all good logic.