To prevent someone from doing something or to restrict access.

रोकना

English Usage: The door was barred to keep intruders out.

Hindi Usage: दरवाज़ा अंदर आने वालों से रोकने के लिए बंद था।

Closed or obstructed as though by a barrier.

अवरुद्ध

English Usage: The barred windows looked ominous in the dim light.

Hindi Usage: बंद खिड़कियाँ मंद रोशनी में डरावनी लग रही थीं।