to register or create an account on a website
registrarse o crear una cuenta en un sitio web (registrarse o crear una cuenta en un sitio web)
"You should sign up to receive our newsletter."
"Deberías sign up para recibir nuestro boletín." (Deberías **sign up** para recibir nuestro boletín.)
to leave school or university before finishing a course
to try to find out information secretly or out of curiosity
to gain control of another company through acquisition
to continue with a happy and positive attitude
to make yourself feel less anxious or nervous
to add layers or levels to a piece of art or design