yawning

an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom; "he could not suppress a yawn"; "the yawning in the audience told him it was time to stop"; "he apologized for his oscitancy"

नींद आने पर उबासी लेना |

A few steps further on there was a dark passage yawning in the wall of the house … two or three steps … there!