English to English

verb (v)

• cause to lose one's composure(verb.emotion)

  Synonym:
  discomfit, discompose, disconcert, upset
  

  source: wordnet30
• cause to be out of tune(verb.change)

  Example:
  Don't untune that string!.
  

  Antonym:
  tune, tune up
  

  source: wordnet30
• To make incapable of harmony, or of harmonious action; to put out of tune.(verb)

  source: webster1913