control

noun:the power to influence or direct people's behavior or the course of events
- The new manager has complete control over the department.
noun:a device or mechanism used to operate or regulate a machine
- She adjusted the temperature with the thermostat control on the wall.
verb:the act of regulating or maintaining a process within desired limits
- Engineers must control the pressure in the boiler to prevent accidents.
verb:to exercise restraint over one's emotions or actions
- He struggled to control his anger.
verb:to limit or reduce the spread of something, such as a disease or a fire
- Public officials are working hard to control the outbreak before it becomes a pandemic.