quaver - definition and synonyms

noun 

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/ˈkweɪvə(r)/
singularquaver
pluralquavers
  1. 1
    [countable] music British a very short musical note that is played for one eighth of the time of a semibreve
     Synonyms and related words
  2. 2
    [singular] the sound of a voice that is not steady because the person speaking feels nervous or afraid