the world > movement > motion in specific manner > alternating or reciprocating motion > oscillation > vibration > vibrate [verb (intransitive)] > tremble or quiver > esp. of light or sound (3)
Said of the tremulous or vibratory motion or effect of light, sound, speech, etc.
Of light, shade, objects seen unsteadily or through a haze: To flicker, quiver.
intransitive. To move tremulously or with vibration; to quiver, vibrate. (Said esp. of sound or light.)