chasm
noun [ C ] uk/ˈkæz.əm/ us/ˈkæz.əm/
（岩石、地面或冰面的）裂隙;峡谷;深渊
a very deep, narrow opening in rock, ice, or the ground
They leaned over the rails and peered down into the dizzying chasm below. 他们靠在栏杆上向下凝视令人眩晕的深渊。
formal（两种观点或两个团体之间的）深刻分歧，显著差别
a very large difference between two opinions or groups of people
There is still a vast economic chasm between developed and developing countries. 发达国家和发展中国家之间仍然存在着巨大的经济差距。