Wu Collection, Lower Volume Radical: Cave (xué) 窏 Kangxi strokes: 11 Page 865, Entry 07 Collected Rhymes (Jiyun): Pronounced wu. Wuan, meaning low. Ma Rong, Rhapsody on the Long Flute (Changdi Fu): The movement is undulating and uneven. Annotation: Wuan describes something curved and not level.