qua·ver /ˈkwevɚ/
  (vi.)發顫音,震動(vt.)顫聲說話,用顫聲歌唱震音,顫聲,八分音符
  Qua·ver, v. i. [imp. & p. p. Quavered p. pr. & vb. n. Quavering.]
  1. To tremble; to vibrate; to shake.
  2. Especially, to shake the voice; to utter or form sound with rapid or tremulous vibrations, as in singing; also, to trill on a musical instrument
  Qua·ver, v. t. To utter with quavers.
     We shall hear her quavering them . . . to some sprightly airs of the opera.   --Addison.
  Qua·ver, n.
  1. A shake, or rapid and tremulous vibration, of the voice, or of an instrument of music.
  2. Mus. An eighth note. See Eighth.
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  quaver
       n 1: a tremulous sound
       2: a musical note having the time value of an eighth of a whole
          note [syn: eighth note]
       v 1: give off unsteady sounds, alternating in amplitude or
            frequency [syn: waver]
       2: sing or play with trills, alternating with the half note
          above or below [syn: warble, trill]