Collapse

a natural event caused by something suddenly falling down or caving in

the act of throwing yourself down

an abrupt failure of function or complete physical exhaustion

a sudden large decline of business or the prices of stocks (especially one that causes additional failures)

break down, literally or metaphorically

fold or close up

lose significance, effectiveness, or value

suffer a nervous breakdown

collapse due to fatigue, an illness, or a sudden attack

fall apart

cause to burst