The spelling of "HTHL" can be a bit confusing if not familiar with the International Phonetic Alphabet (IPA). The correct spelling is /həˈθɛl/, with the stress on the second syllable. The "h" at the beginning represents the sound of the letter "h," followed by a schwa sound represented by the symbol "ə." The "th" in the second syllable represents the voiceless dental fricative sound, which is a common sound in English words such as "think" or "thinker." The final "l" is simply the sound of the letter "l."