downfall

ˈdaʊnfɔːl

noun

a loss of power, prosperity, or status.

undoing,ruin,ruination,defeat,conquest,vanquishing,toppling,deposition,ousting,unseating,overthrow,nemesis,destruction,annihilation,elimination,end,collapse,fall,crash,failure,debasement,degradation,disgrace,Waterloo,labefaction