dissonance

 
Pronunciation: /ˈdɪs(ə)nəns/

noun

[mass noun] Music
  • lack of harmony among musical notes: an unusual degree of dissonance for such choral styles [count noun]: a session full of jangling dissonances
  • lack of agreement or harmony between people or things: the party faithful might be willing to put up with such dissonance among their candidates

Origin:

late Middle English: from Old French, from late Latin dissonantia, from Latin dissonant- 'disagreeing in sound', from the verb dissonare