crumble

Verb

• fall into decay or ruin
  • The unoccupied house started to decay
    

• break or fall apart into fragments
  • The cookies crumbled
    
  • The Sphinx is crumbling
    

• fall apart
  • the building crumbled after the explosion
    
  • Negotiations broke down
    

Related words

• Synonyms: 
  decay , dilapidate , fall apart , crumple , tumble , break down , collapse