To hold back or limit.

To prevent someone from doing something.

रोकना

English Usage: The police had to restrain the suspect during the arrest.

Hindi Usage: पुलिस को गिरफ्तारी के दौरान संदिग्ध को रोकना पड़ा।

A limitation or restriction.

प्रतिबंध

English Usage: The new laws impose a restrain on cigarette advertising.

Hindi Usage: नए कानून सिगरेट विज्ञापन पर प्रतिबंध लगाते हैं।