activar

verb
  1. To make something active or operative; to initiate or start a process or function. verb
    The technician will activate the new software on your computer.
    You need to activate your account before you can start using the service.
  2. To stimulate or energize something, often to increase its activity or effectiveness. verb
    The sunlight activates the production of vitamin D in the skin.
    The coach's motivational speech activated the team's enthusiasm.