verb (v)

• free or relieve (someone) of a burden(verb.possession)

  source: wordnet30
• take the burden off; remove the burden from(verb.contact)

  Example:
  Unburden the donkey.
  

  Synonym:
  disburden
  Antonym:
  burden, burthen, weight, weight down
  

  source: wordnet30
• To relieve from a burden.(verb)

  source: webster1913