Shake uncontrollably (5)
I believe the answer is:
quake
(Other definitions for quake that I've seen before include "Tremble (with fear)" , "Vibration of the earth" , "Tremble, shake" , "Vibrate" , "Earth tremor" .)
I believe the answer is:
quake
(Other definitions for quake that I've seen before include "Tremble (with fear)" , "Vibration of the earth" , "Tremble, shake" , "Vibrate" , "Earth tremor" .)