The spelling of the word "tylhexactine" can be broken down using the International Phonetic Alphabet (IPA). The first sound is a "t" with a slight aspiration, followed by a "ai" diphthong sound. The next sound is a "l" which is pronounced with the tongue touching the roof of the mouth. The next sound is "h," which is pronounced with an exhalation of air. The next sound is similar to "ek," then the word concludes with the sound of "sak-teen." With this pronunciation guide, the elusive spelling of "tylhexactine" can be written with ease.