Mao Collection, Middle Volume. Radical: Hand (shǒu). Entry: Wu. Kangxi strokes: 7. Page 418, Entry 08.
Tang Dynasty Rhymes (Tangyun), Collected Rhymes (Jiyun), Dictionary of Rhymes (Yunhui), and Correct Rhymes (Zhengyun) state: Pronounced wu.
Shuowen Jiezi states: To move.
Book of Odes (Shijing): Heaven is crushing me, as if fearing it will not bring me down.
Rites of Zhou (Zhouli), Winter Official, Artificers Record: If the wheel spoke is wide and the mortise is shallow, it will therefore wobble significantly.
Yangzi: Dialects (Fangyan): Wu means not stable.
Also, Guangyun and Jiyun state: Pronounced yue. The meaning is the same. The annotations of the Book of Odes offer two pronunciations.
Also, Jiyun states: Pronounced like the entering tone of the word wan. The meaning is the same. Sometimes also written in a variant form (zhu).