consultant

A consultant is a person who helps other people with their problems or gives them advice. For example, if your mom and dad want to build a new house, they might hire a consultant who can tell them the best way to do it.

A consultant is like a teacher who knows a lot about a specific topic and can teach others about it. For example, if you want to learn how to play the piano, you can hire a piano consultant who will teach you all the cool tricks and techniques.