The word "出乎" is formed by directly combining the character "出", meaning "to go out" or "exceed", with the classical Chinese particle "乎", which here functions as a preposition equivalent to "from" or "at". This combination creates a compound that literally conveys "out from" and is used in modern Chinese as a preposition meaning "beyond" or "out of", as seen in phrases like "出乎意料" (beyond expectation).