Aide (noun)

1. A person who provides assistance to another person.
2. A person who works as a helper or assistant.
3. A military officer who acts as an assistant to a senior officer.

Origin:

From french aide "assistant".

Examples:

1. She is the personal aide to the CEO.
2. The nurse is an aide to the doctor.
3. The general's aide was responsible for his schedule.
4. He is an aide at the nursing home.
5. The aide provided assistance to the disabled person.