The spelling of the word "KH" is unique and can be challenging for non-native speakers. In terms of IPA phonetic transcription, "KH" represents a voiceless velar fricative sound, similar to the "ch" sound in "loch". This sound is produced by positioning the back of the tongue against the soft palate and forcing air through a narrow opening. It is important to remember that the "KH" sound is distinct from the "K" sound and requires a different articulation of the tongue and mouth.