collapse -
a natural event caused by something suddenly falling down or caving in; "the roof is in danger of collapse"; "the collapse of the old star under its own gravity"
descent the act of changing your location in a downward direction
Verb
collapse -
break down, literally or metaphorically; "The wall collapsed"; "The business collapsed"; "The dam broke"; "The roof collapsed"; "The wall gave in"; "The roof finally gave under the weight of the ice"
change undergo a change; become different in essence; losing one's or its original nature; "She changed completely as she grew older"; "The weather changed last night"
abandon,
give up stop maintaining or insisting on; of ideas or claims; "He abandoned the thought of asking for her hand in marriage"; "Both sides have to give up some claims in these negotiations"
break weaken or destroy in spirit or body; "His resistance was broken"; "a man broken by the terrible experience of near-death"
slide down,
slump,
sink fall heavily or suddenly; decline markedly; "The real estate market fell off"
collapse,
burst lose significance, effectiveness, or value; "The school system is collapsing"; "The stock market collapsed"
collapse -
fold or close up; "fold up your umbrella"; "collapse the music stand"
fold up,
fold,
turn up incorporate a food ingredient into a mixture by repeatedly turning it over without stirring or beating; "Fold the egg whites into the batter"
deflate become deflated or flaccid, as by losing air; "The balloons deflated"