совер.
без доп.
1) crash down, tumble down, collapse
2) разг. fail
crash
be destroyed, fall to the ground
collapse, fall through
come to naught
рухну|ть - сов. collapse (тж. перен.)
(о крыше, потолке тж.) fall* in
он ~л на землю как подкошенный he collapsed in a heap on the ground
наши надежды ~ли our hopes were dashed to the ground