Pronunciation: [mˈə͡ʊst wˈɛlsɛt] (IPA) 
The correct spelling for the word we commonly write as "most wellset" is actually "most well-set." The hyphen is used to connect the two words that together form an adjective phrase used to describe a person's build or physique. The IPA phonetic transcription is /moʊst ˌwɛlˈsɛt/, with the stress on the second syllable of "well-set." This word is often confused with "wellness," but its meaning is quite different.
The phrase "most wellset" is not a commonly used or recognized word. It appears to be a combination of the adjective "most" and the adjective "wellset".
The adjective "wellset" means having an attractive or well-proportioned figure or physique. It is formed by combining the adverb "well" with the past participle of the verb "set", which means to fix in place or position.
However, the phrase "most wellset" as a whole does not have a specific etymology since it is not a standard term or expression. It seems to be a combination of two English words used in comparison to imply the highest level of being wellset or well proportioned.
