collapse

collapse verb uk/kəˈlæps/ us collapse verb
(OBJECT)

B2 to fall down or towards the inside, or to make a structure or object fall down or towards its inside

обваливаться, рушиться
The roof collapse d under the weight of snow. collapse verb
(FAILURE)

B2 the sudden failure of a system, organization, business, etc

крах, развал
collapse noun [C, U]