icefall

名词 icefall:

1. a steep part of a glacier resembling a frozen waterfall

ice.fall

n.（名词）
The part of a glacier resembling a frozen waterfall that flows down a steep slope.
冰瀑：冰川的一部分，类似于从峭壁上泻下的冰冻了的瀑布
An avalanche of ice.
冰崩：冰的崩塌