aide

noun

1. nurse’s aide.
2. an aide-de-camp.
3. an assistant or helper, especially a confidential one.

noun

1. an assistant
2. social welfare an unqualified assistant to a professional welfare worker
3. short for aide-de-camp

n.

1777, short for aide-de-camp (1660s), French, literally “camp assistant” (see aid (n.)).