The spelling of the word "hehn" can be explained by its phonetic transcription in IPA as /hɛn/. The first sound is a voiceless glottal fricative, followed by the short "e" vowel sound, and ending with the nasal consonant "n". This spelling might be confusing for some as the sound "h" at the beginning is not commonly associated with the letter "e", which is typically spelled with an "i" or an "e" in English. However, this spelling accurately represents the sound of the word in IPA.