Some common reasons include: 1  a serious accident â such as a road accident, a severe head injury, a serious fall or severe burns. 2  a serious short-term condition â such as a heart attack or a stroke. 3  a serious infection â such as sepsis (blood poisoning) or severe pneumonia.
The definition of unnecessary is not needed. An example of something unnecessary is a bowl of sugar for cooking meatballs.
One that is inconvenient, annoying, or vexatious; a bother: Having to stand in line was a nuisance. The disruptive child was a nuisance to the class. 2. Law A use of property or course of conduct that interferes with the legal rights of others by causing damage, annoyance, or inconvenience.