рухнуть означает в английский

plummet [plummeted, plummeting, plummets]▼(to drop swiftly, in a direct manner; to fall quickly)
verb
[UK: ˈplʌ.mɪt] [US: ˈplʌ.mət]

slump [slumped, slumping, slumps]▼(to collapse heavily)
verb
[UK: slʌmp] [US: sˈləmp]