to choose not to participate in something
elegir no participar en algo (elegir no participar en algo)
"You can opt out of the newsletter at any time."
"Puedes darte de baja del boletín en cualquier momento." (Puedes darte de baja del boletín en cualquier momento.)
to have confidence in your own abilities
to make a process operate automatically using technology
to join or agree with a group or plan
to create your own way of achieving success or independence
feeling very worried or tense because of problems
a job with no opportunity for advancement or improvement