The spelling of "most administering" is straightforward when we break it down phonetically. "Most" is pronounced /moʊst/, with the long "o" sound and the "st" consonant cluster. "Administering" is pronounced /ədˈmɪnəstərɪŋ/, with the schwa vowel sound followed by the stressed "min" sound and the "st" consonant cluster. Together, the word is pronounced /moʊst ədˈmɪnəstərɪŋ/ and refers to the act of overseeing or supervising something on a large scale.
The term "most administering" does not have a specific etymology as it is not a commonly used phrase or word. "Most" typically functions as a superlative form of "more", meaning the greatest or highest degree of something. "Administering" is the present participle form of the verb "administer", meaning to manage, supervise, or carry out. However, when used together, "most administering" does not have a clear meaning or context.