The spelling of the word "most sideward" can be explained using IPA phonetic transcription. The first syllable "most" is pronounced as /moʊst/ with the long "o" sound and the "st" consonant cluster. The second syllable "side" is pronounced as /saɪd/ with the "s" and "d" consonant sounds and the long "i" sound. The final syllable "ward" is pronounced as /wɔrd/ with the "w" consonant sound and the "aw" sound. Together, the word is pronounced as /moʊst saɪd wɔrd/.