verb (v)

• keep in a certain state, position, or activity; e.g.,(verb.stative)

  Synonym:
  hold, keep
  

  source: wordnet30
• keep in safety and protect from harm, decay, loss, or destruction(verb.possession)

  Synonym:
  conserve, keep up, preserve
  

  source: wordnet30
• supply with necessities and support(verb.consumption)

  Synonym:
  keep, sustain
  

  source: wordnet30
• state categorically(verb.communication)

  Synonym:
  assert, asseverate
  

  source: wordnet30
• have and exercise(verb.possession)

  Synonym:
  exert, wield
  

  source: wordnet30
• maintain for use and service(verb.possession)

  Synonym:
  keep
  

  source: wordnet30
• maintain by writing regular records(verb.communication)

  Example:
  Maintain a record.
  

  source: wordnet30
• state or assert(verb.communication)

  Example:
  He maintained his innocence.
  

  Synonym:
  defend
  

  source: wordnet30
• support against an opponent(verb.communication)

  Synonym:
  uphold
  

  source: wordnet30
• stick to correctly or closely(verb.cognition)

  Synonym:
  keep, observe
  

  source: wordnet30
• To hold or keep in any particular state or condition; to support; to sustain; to uphold; to keep up; not to suffer to fail or decline; as, to maintain a certain degree of heat in a furnace; to maintain a fence or a railroad; to maintain the digestive process or powers of the stomach; to maintain the fertility of soil; to maintain present reputation.(verb)

  source: webster1913