The spelling of the word "HEGI" can be explained using the International Phonetic Alphabet (IPA). The first letter "H" is pronounced /h/, representing the voiceless glottal fricative. The second letter "E" is pronounced /ɛ/, representing the open-mid front unrounded vowel. The third letter "G" is pronounced /ɡ/, representing the voiced velar stop. The final letter "I" is pronounced /i/, representing the close front unrounded vowel. Together, these sounds create the spelling of "HEGI".