verb (v)

• represent as less significant or important(verb.communication)

  Synonym:
  minimise, minimize, understate
  Antonym:
  amplify, exaggerate, hyperbolise, hyperbolize, magnify, overdraw, overstate
  

  source: wordnet30
• understate the importance or quality of(verb.change)

  Synonym:
  background, play down
  Antonym:
  foreground, highlight, play up, spotlight
  

  source: wordnet30