The word "Yux" is spelled with the letters Y-U-X. In IPA (International Phonetic Alphabet) transcription, the word would be pronounced as /jəks/. This phonetic transcription includes a yod sound (represented by the letter j) at the beginning of the word, followed by a short u sound and ending with a voiceless velar fricative (represented by the letter x). While the spelling of "Yux" may seem unusual or nonsensical, it is a valid word in the English language.
There is limited information available about the etymology of the word "Yux". It is not a widely recognized word with an established etymology. It could be a unique or specialized term that is not widely documented. To provide a more accurate answer, it would be helpful to have additional context or information about how or in what context you encountered the word.