Genius (noun)

1. Exceptional intellectual or creative power or other natural ability.
2. A person who has exceptional intellectual or creative power.
3. A person who has an extraordinary talent or ability.

Origin:

From latin genius "guardian spirit, innate ability, natural endowment", from gignere "beget, produce", from proto-italic *gen- "to beget, produce".

Examples:

1. Einstein was a genius in the field of physics.
2. She is a genius at mathematics.
3. He is a genius at playing the piano.
4. The company's success is due to the genius of its founder.
5. It takes a genius to understand the theory of relativity.