English to English

verb (v)

• restore to its uncompressed form(verb.contact)

  Example:
  Decompress data.
  

  Synonym:
  uncompress
  Antonym:
  compact, compress, pack together
  

  source: wordnet30
• decrease the pressure of(verb.change)

  Synonym:
  depressurise, depressurize
  Antonym:
  pressurise, pressurize
  

  source: wordnet30
• become less tense, rest, or take one's ease(verb.body)

  Synonym:
  loosen up, relax, slow down, unbend, unwind
  Antonym:
  tense, tense up
  

  source: wordnet30