In a manner that has never happened before.

पहले कभी नहीं हुआ तरीके से

English Usage: The results were unprecedentedly successful, exceeding all expectations.

Hindi Usage: परिणाम पहले कभी नहीं हुए तरीके से सफल रहे, सभी अपेक्षाओं से अधिक।