verb, adverb · to fall down or cave in suddenly, used for buildings, structures, or metaphorical systems

地震造成大量老旧房屋在瞬间崩塌。

verb · the crumbling or sliding down of a mass of earth or rock, such as a scree slope or mountainside

暴雨过后，这条公路因山体崩塌而被迫中断。