Undisputed (adjective)

1. Not disputed; generally accepted as true, accurate, or certain.
2. Not open to question or doubt.

Origin:

From un- (not) + dispute (to argue or contest).

Examples:

1. The undisputed champion of the tournament.
2. His undisputed authority in the field.
3. She has an undisputed talent for playing the piano.
4. The facts were undisputed in the court case.
5. The undisputed leader of the company.