Tang Rhymes (Tangyun) and Collected Rhymes (Jiyun) state it is pronounced fou (rising tone). Explaining Characters (Shuowen Jiezi) defines it as the handle of a knife. Additionally, Extensive Rhymes (Guangyun) states it is pronounced fu (rising tone). It is identical to the character fu. Zi Collection, Page Position: Upper Radical: Knife (dāo) Page 135, Entry 01