to dance; to wield; to brandish
Originally written as 無, which is a pictograph of a person dancing, with ox tails or bird feathers hanging from his arms, to pray for rain. The 舛 (two feet) component was later added to emphasize the action of dancing after 無 was phonetically borrowed for different meanings.
《說文》：“舞，樂也。用足相背。从舛，舞聲。，古文舞从羽、亡。”