verb (v)

• put an end to a state or an activity(verb.stative)

  Synonym:
  cease, give up, lay off, quit, stop
  Antonym:
  bear on, carry on, continue, preserve, uphold
  

  source: wordnet30
• come to or be at an end(verb.stative)

  Example:
  The support from our sponsoring agency will discontinue after March 31.
  

  Antonym:
  continue, go along, go on, keep, proceed
  

  source: wordnet30
• prevent completion(verb.change)

  Synonym:
  break, break off, stop
  

  source: wordnet30
• To interrupt the continuance of; to intermit, as a practice or habit; to put an end to; to cause to cease; to cease using, to stop; to leave off.(verb)

  source: webster1913
• To lose continuity or cohesion of parts; to be disrupted or broken off.(verb)

  source: webster1913