Which Greek letter corresponds to the sound 'X'?

The Greek letter that corresponds to the sound 'X' is Chi. In the Greek alphabet, Chi is represented by the letter "Χ" (uppercase) and "χ" (lowercase) and is often associated with a sound that is similar to "k" or "kh," which in certain contexts can also resonate with the sound of 'X' as used in English.

This connection is important in the context of Greek mythology and language, as Chi is also used in various words and terms that have Greek origins, contributing to its phonetic identity. Understanding the Greek alphabet and its corresponding sounds can greatly aid in grasping the cultural and linguistic significance of Greek letters in various academic and extracurricular contexts, including fraternity and sorority life.

The other letters listed do not correspond to the 'X' sound. Kappa produces a 'k' sound, while Psi represents a combination of 'p' and 's' sounds. Thus, Chi is the clear choice for representing the 'X' sound in this context.