Crevasse (noun)

1. A deep crack or fissure, especially in a glacier or ice sheet.
2. A large, steep-sided split or gap in a surface, such as a road or a rock face.

Origin:

Derived from the french word 'crevasser' meaning 'to break, crack'.

Examples:

1. The climbers had to cross a narrow bridge over a crevasse in the glacier.
2. The crevasses in the ice sheet made it difficult for the scientists to measure its thickness.
3. The crevasses in the rock face presented a significant challenge for the climbers.
4. The crevasse was created by the movement and separation of the glacier.
5. The crevasse was so deep that it was impossible to see the bottom from the surface.