Collapse
Destruction, Crumbling
noun, verbal noun
When something collapses and breaks, it is when a collapse happens. When this happens, it is destruction. It is also probably something that was already crumbling apart.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
私の祖父母の家はとても古いので、雪の重みで倒壊しかねません。
My grandparents’ house is so old that it could collapse under the weight of the snow.