verb (v)

• part; cease or break association with(verb.social)

  Synonym:
  disassociate, disjoint, disunite, divorce
  

  source: wordnet30
• regard as unconnected(verb.cognition)

  Example:
  You must dissociate these two events!.
  

  Synonym:
  decouple
  Antonym:
  associate, colligate, connect, link, link up, relate, tie in
  

  source: wordnet30
• to undergo a reversible or temporary breakdown of a molecule into simpler molecules or atoms(verb.change)

  Example:
  Acids dissociate to give hydrogen ions.
  

  source: wordnet30
• To separate from fellowship or union; to disunite; to disjoin; as, to dissociate the particles of a concrete substance.(verb)

  source: webster1913