Collection of Characters (Pianhai) records the pronunciation as jiao. The sound is the same as jiao. It means to call out. True Meaning of Characters (Zhengzitong) states that this is an erroneous form of the character for call. The character was originally composed of the components for mouth and son. Supplementary note: Dragon Shrine (Longkan) records the pronunciation as shen. It means to chant or intone.