The spelling of the word "most incitive" may seem challenging but it follows the basic rules of English phonetics. The word is spelled as /məʊst ɪn'saɪtɪv/ in IPA transcription. The first syllable is pronounced with a schwa sound followed by the stress on the second syllable. The letter "c" is followed by the vowel "i" and "tive" at the end follows the common suffix rule. Despite its uncommon usage, once understood, the spelling and pronunciation of "most incitive" become easier to grasp.