activate

verb

• To encourage development or induce increased activity; to stimulate.
• To put a device, mechanism (alarm etc.) or system into action or motion; to trigger, to actuate, to set off, to enable.
• To render more reactive; excite.
• To render a molecule reactive, active, or effective in performing its function.
• To render a substance radioactive.
• To hasten a chemical reaction, especially by heating.
• To remove the limitations of demoware by providing a license; to unlock.
• To aerate in order to aid decomposition of organic matter.
• To organize or create a military unit or station.
• To bring a player back after an injury.