verb (v)

• make ineffective(verb.competition)

  Example:
  Martin Luther King tried to break down racial discrimination.
  

  Synonym:
  crush
  

  source: wordnet30
• make a mathematical, chemical, or grammatical analysis of; break down into components or essential features(verb.cognition)

  Synonym:
  analyse, analyze, dissect, take apart
  Antonym:
  synthesise, synthesize
  

  source: wordnet30
• lose control of one's emotions(verb.emotion)

  Synonym:
  lose it, snap
  

  source: wordnet30
• stop operating or functioning(verb.change)

  Synonym:
  break, conk out, die, fail, give out, give way, go, go bad
  

  source: wordnet30
• fall apart(verb.motion)

  Synonym:
  collapse, crumble, crumple, tumble
  

  source: wordnet30
• cause to fall or collapse(verb.contact)

  source: wordnet30
• separate (substances) into constituent elements or parts(verb.change)

  Synonym:
  break up, decompose
  

  source: wordnet30
• collapse due to fatigue, an illness, or a sudden attack(verb.body)

  Synonym:
  collapse
  

  source: wordnet30