up vote 2 down vote. The 'exhaust' meaning of the word enervate is a figurative sense that came in later. The original, now archaic/DSL meaning of enervation is to 'cut the nerve (of)', early 15C. The figurative sense is from the 1550s. enervate: (medicine) To partially or completely remove a nerve.
Lesson Summary. A computer system unit is the enclosure that contains the main components of a computer, typically made of steel or aluminum. It holds all other components together and protects the sensitive electronic parts from the outside elements.
This is where everything comes together to work. The system box holds the central processing unit to act as the brains of the computer. The unit contains the motherboard which is the main circuitry for the system. The power supply for the main computer is located in the unit. All the other parts including the monitor, mouse, keyboard, speakers, and others join at the unit to become a functional system.