The two-letter sequence C-H-I is a valid word in Scrabble and similar word games. It represents the vital life force or energy purported to animate living beings in some traditional Eastern belief systems. It can also refer to the Greek letter Chi (, ), the 22nd letter of the Greek alphabet.
Its acceptance in word games reflects the adoption of this originally Chinese concept into broader English usage. Knowing its validity can be strategically beneficial for players, offering opportunities to create short, high-scoring plays, especially when using premium squares. Understanding the word’s etymology and multiple meanings also enhances general knowledge.