collapse

sense 1: 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"
collapse fall_in cave_in give give_way break founder

sense 2: collapse due to fatigue, an illness, or a sudden attack
break_down collapse

sense 3: fold or close up, as of an umbrella or a music stand
collapse

sense 4: fall apart; also used metaphorically; "Negociations broke down"
crumble crumple tumble break_down collapse

sense 5: cause to burst; "The ice broke the pipe"
collapse burst

sense 6: suffer a nervous breakdown
crack_up crack crock_up break_up collapse

sense 7: lose significance, effectiveness, or value; "The school system is collapsing"; "The stock market collapsed"
collapse