verb (v)

• release, as from one's grip(verb.contact)

  Example:
  Let go of the door handle, please!.
  

  Synonym:
  let go of, release, relinquish
  Antonym:
  hold, take hold
  

  source: wordnet30
• be relaxed(verb.stative)

  Example:
  Don't be so worried all the time--just let go!.
  

  source: wordnet30