The word 抖动 is formed by combining the character 抖, which means to shake or tremble and is composed of the hand radical 扌 alongside the component 斗 primarily for phonetic indication, with the character 动, meaning to move, which in its simplified form consists of 力 (force) and 云 (cloud). The semantic contribution of 抖 specifies the action of shaking, while 动 provides the general notion of movement, resulting in a compound that denotes vibrating or jittering motion.