The spelling of the word "Dellis" can be explained using the International Phonetic Alphabet (IPA). The initial sound is a voiced dental fricative, represented by the symbol /ð/. This is followed by an /ɛ/ vowel sound, which is pronounced with an open-mid front unrounded position of the tongue. The final sound is a voiced alveolar fricative, represented by the symbol /z/. The spelling "Dellis" is a phonetic transcription of how the word is pronounced, with attention given to each individual sound in the word.