The spelling of the word "NEHCA" may seem odd, but it actually follows the rules of phonetics. Each letter corresponds to a sound: /n/ for the "N," /ɛ/ for the "E," /h/ for the "H," and /kə/ for the "CA." The final "A" is not pronounced, but represents the schwa vowel sound /ə/. Therefore, the phonetic transcription of "NEHCA" is /ˈnɛhkə/, with the stress on the second syllable. This spelling emphasizes the unique sound and rhythm of the word.