the boundary line or the area immediately beyond it.

किनारा

English Usage: She stood at the edge of the cliff.

Hindi Usage: वह चट्टान के किनारे खड़ी थी।

to move from a closed position to an open position.

खोलना

English Usage: He opened the door slowly.

Hindi Usage: उसने धीरे-धीरे दरवाज़ा खोला।