The word went echoing solemnly back and forth around the cold rock walls.

The sound echoed back and forth between the surrounding hills as the Bears began running towards the south.

The old man expelled a cry as he struck the concrete; it echoed back and forth.

The only reply was his own voice, echoing back and forth until it died.

Their voices echoed back and forth across the water like the calls of water birds.

His voice echoed back and forth in the chamber.

His voice echoed back and forth inside the tower.

His voice echoed back and forth through the deserted tract.

His laugh echoed back and forth in the pitch-black cellar.

His thoughts kept echoing back and forth in his mind, unable to escape.