Chasm
Context
A deep fissure in the earth, rock, or another surface, often formed by erosion
Explanation
A chasm is a deep, steep-sided opening in the earth's surface, larger than a crack. They can be formed by the movement of tectonic plates or by erosion processes.
Applications
The chasm was so deep that one could not see the bottom.
Hikers must be cautious when navigating near a chasm.
Chasms are often found in regions with significant geological activity.