Wuji is the undifferentiated state before there was movement or yin and yang. Before these two things give birth to many things that manifest their qualities and behaviors in our world. Wuji is infinite.
Wu is defined as without, none, non.
Ji (pronounced Chee) is defined as limits, extreme, end, ultimate.
IN QII-TAU, Wuji is our center, our return. This is where we focus on emphasizing internal movement with external stillness.