The spelling of the word "houk" is phonetically represented as /hʊk/. The first sound, "h", is a voiceless glottal fricative made by exhaling air and passing it over the vocal cords. The second sound, "ou", is a diphthong pronounced as /aʊ/ which is a combination of the single vowel sounds /a/ and /ʊ/. Finally, the last sound, "k", is a voiceless velar plosive made by blocking the airflow in the mouth with the back of the tongue and releasing it suddenly.