verb (v)

• prevent from being seen or discovered(verb.perception)

  Synonym:
  hide
  Antonym:
  show
  

  source: wordnet30
• hold back; keep from being perceived by others(verb.perception)

  Example:
  She conceals her anger well.
  

  Synonym:
  hold back, hold in
  

  source: wordnet30
• To hide or withdraw from observation; to cover; to cover or keep from sight; to prevent the discovery of; to withhold knowledge of.(verb)

  source: webster1913