The correct spelling of the word "most pasturing" is /moʊst ˈpæstʃərɪŋ/. The "o" in "most" is pronounced as a long "o" sound while the "a" in "pasturing" is pronounced as a short "a" sound. The "ch" sound in "pasturing" is spelled as "ch" rather than "tch" because it follows the vowels a, e, i, o, or u. The word refers to the act of grazing livestock on pastures, making it an important term in the agricultural industry.