The spelling of the word "most ensured" is straightforward when broken down into its constituent sounds. The first syllable "most" is pronounced /moʊst/ with a long 'o' sound followed by a 's' sound and a 't' sound at the end. The second syllable "en-sured" includes the 'en' prefix and is pronounced /ɛn/ followed by the 's' sound and a long 'u' sound, and ending with a 'd' sound. Together, the word is pronounced /moʊst ɛnʃʊrd/, with the stress on the second syllable.
The phrase "most ensured" is formed by combining the superlative form of "most" and the past participle form of the verb "ensure". The original word from which "ensure" evolved is the Latin word "securus", meaning "free from care" or "safe". In Old French, it transformed into "asseürer", meaning "to make secure" or "to assure". Over time, the word made its way into English as "ensure", maintaining its sense of safeguarding or guaranteeing something. The addition of "most" in "most ensured" emphasizes the highest degree of being made secure or assured.