The Chinese word "瞌睡" is formed by combining the characters "瞌" and "睡", each containing the "目" (eye) radical. "瞌" integrates "盍" primarily for phonetic value while associating with drowsiness through the eye component, and "睡" combines "目" with "垂" (meaning to droop) to visually depict eyes closing in sleep. Together, they create a compound where both characters semantically emphasize sleepiness through direct reference to eye behavior.