"Book of Rhymes (Tang Yun)" and "Collected Rhymes (Jiyun)" state that this character is pronounced "yu zhao qie," with the same pronunciation as the character "yao." "Shuowen Jiezi" explains it as meaning to leap. "Yangzi's Dialects (Fangyan)" records that in the dialect of the Zheng region, leaping is called "du." "Guangyun" mentions the term "tiao du," describing the posture of walking and leaping. Additionally, "Collected Rhymes (Jiyun)" notes the pronunciation as "yi xiao qie," with the same pronunciation as the character "yao." The meaning is the same.