The spelling of the word "ACUDA" can be explained with the International Phonetic Alphabet (IPA) system. The first syllable "A" is pronounced as /ə/ which represents a schwa sound. The second syllable "CU" is pronounced as /ku/ which represents a "koo" sound. The final syllable "DA" is pronounced as /də/ which represents a schwa sound again. Therefore, "ACUDA" is spelled as /ə-koo-də/ in IPA. It is important to use IPA to accurately represent the pronunciation of words regardless of their peculiar spellings.