The spelling of the word "Diasatine" can be explained using the International Phonetic Alphabet (IPA). The first syllable "Dias-" is pronounced /daɪəs/ with the diphthong "ai" representing the sound "aɪ". The second syllable "-atine" is pronounced /ætɪn/ with the "a" sound being pronounced as the short vowel sound "æ" and the "ine" representing the sound "ɪn". Therefore, the correct pronunciation of this word is "daɪəs-ætɪn".