The spelling of the word "DIEXT" can be explained through its phonetic transcription: /dɪ.ɛkst/. The "DI" represents the /dɪ/ sound while "EXT" stands for the /ɛkst/ sound. The letter "I" in "DI" is pronounced as "ih," while the letter "E" in "EXT" is pronounced as "ɛ." The letter "X" is pronounced as "ks," and the letter "T" is pronounced as "t." Overall, the spelling of "DIEXT" is a combination of specific phonemes that create a unique and distinct word.