avalanche
noun
a large mass of snow, ice, etc., detached from a mountain slope and sliding or falling suddenly downward.
Used to describe actions that started in the past and continue into or have direct relevance to the present.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The tremendous granite slides, where the cliff has avalanched thousands of tons of loose jagged rock-fragments across the passage, are the worst.
From The Mountains by Stewart Edward White