To cause someone to feel amazed or astonished.

अचंभित करना

English Usage: The magician's trick will surprise the audience.

Hindi Usage: जादूगर का करतब दर्शकों को अचंभित करेगा।

An unexpected event or outcome that causes astonishment.

आश्चर्य

English Usage: Her sudden arrival was a complete surprise to everyone.

Hindi Usage: उसकी अचानक आगमन सभी के लिए एक पूर्ण आश्चर्य था।