The spelling of the phrase "most slew" can be confusing due to its pronunciation. The word "most" is pronounced as /moʊst/, while "slew" is pronounced as /slu/. The confusion arises because some speakers tend to blend the two words together, resulting in a pronunciation that sounds like /moslu/. However, it is important to remember that the correct spelling is "most slew" and it should be pronounced as two separate words. "Most" means the greatest amount, while "slew" means to turn or swerve abruptly.
The phrase "most slew" does not have a specific etymology as it is a combination of two separate words. "Most" is an English adverb meaning "to the greatest extent" or "very", while "slew" is a noun meaning "a large number" or "a great deal". "Slew" originated from the Old English word "sleaw", which meant "skillful" or "clever". Over time, "slew" evolved to also represent a large quantity or amount. Together, "most slew" implies a significant or substantial number or amount of something.