It is now. The word appears in Hasbro's official online Scrabble dictionary at the link listed below. Qi: the vital force that in Chinese thought is inherent in all things.
In English, if a letter follows Q, it will be a U, so no words end in QI.
Iraqi
Yes, it is a legal scrabble word. It is, in Chinese philosophy, the energy that encircles every life.
6-letter words qindar, qintar, qiviut 7-letter wordsqindars, qintars, qiviuts 8-letter wordsqindarka