Qi is a
Chinese word, and has parallels in
Japanese,
Korean, and
Sanskrit (see also:
chi)
It is a common word in Chinese, and means many things, such as air, vapor, atmosphere, ambience, or energy. Ying and Yang are considered as two constrating manifestations of qi. It is believed that the state of the body, or a person's luck are determined by the flow of qi.
Qi and its flows are the basis behind arts such as Feng Shui, Acupuncture, and Yoga.
According to the 2 letter word list contained in the latest British version of Scrabble Qi is an acceptable word, as it has been absorbed into the English language. It is defined as the "alternative spelling of chi; an individual's life force". This makes it the shortest word using a Q with no U in the game.