to surrender, to give up
Vamos a intentar una vez más antes de rendirnos.
Let's try one more time before we give up.
Primero lucharemos, antes que rendirnos.
We’ll fight first rather than surrender.
— Acantilado Rojo (2008)
Estábamos juntos en esto desde el principio y no íbamos a rendirnos ahora.
We were in this together from the beginning and we weren't going to give up now.