The word "most during" is spelled as it sounds, with the phonetic symbols /məʊst/ for "most" and /ˈdjʊərɪŋ/ for "during". The first syllable of "most" is pronounced with a long o sound and the second syllable is reduced to the schwa sound. The word "during" is pronounced with two syllables, with the stress on the first syllable and a yoo sound for the letter u. Despite its simplicity, the spelling of "most during" can still be challenging for non-native English speakers due to the variety of English accents and regional variations.
The phrase "most during" does not have a distinct etymology as it is not commonly used or recognized as a specific phrase. "Most" is classified as a superlative adverb which means "in the greatest degree or quantity". "During" is a preposition that indicates a period of time or an event happening within a particular time frame. Therefore, "most during" may be a combination of these two words to convey the idea of something occurring or being most pronounced or significant within a certain time period. However, it is not a widely recognized phrase with a specific etymology.