wobble
noun
°An unsteady motion.
"The fat man walked down the street with a wobble."
°A tremulous sound.
"There was a wobble on her high notes."
verb
°To move with an uneven or rocking motion, or unsteadily to and fro.
"The Earth wobbles slowly on its axis ."
°To tremble or quaver.
"The soprano's voice wobbled alarmingly."
synonyms: jiggle, quiver, shake, tremble more» , quaver, tremolo, vibrato, judder, shake, shudder, tremble, quaver, quiver, falter, vacillate, waffle, waver, jiggle, rock, wiggle