There are hidden or unknown aspects to a situation or person that are not immediately obvious.

ऐसा कुछ जो प्रत्यक्षतः दिखाई नहीं दे रहा हो।

English Usage: At first glance, the project seems simple, but there is more in than meets the eye.

Hindi Usage: पहली नजर में यह परियोजना सरल लगती है, लेकिन इसमें नजर आने से ज्यादा कुछ है।