un·tune /-ˈtun, ˈtjun/
  Un·tune v. t.  To make incapable of harmony, or of harmonious action; to put out of tune.
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  untune
       v 1: cause to lose one's composure [syn: upset, discompose, disconcert,
             discomfit]
       2: cause to be out of tune; "Don't untune that string!" [ant: tune]