The spelling of the word "most pronged" can be a bit confusing. The IPA phonetic transcription for this word is /məʊst prɒŋd/. Here, the "o" sound in "most" is pronounced as "əʊ", which is a diphthong sound that combines the "oh" and "wuh" sounds. The "r" in "pronged" is pronounced with a retroflex sound represented by the symbol "ɒ", which sounds like a rounded "a" sound but with the tongue curled back slightly. Consequently, the spelling might trip up those not used to these complexities of English pronunciation.
The word "most pronged" does not have a specific etymology. It appears to be a combination of the adjective "most" and the noun "pronged". However, "pronged" can be traced back to the noun "prong", which originated in the 14th century and referred to a pointed or projecting part of an object. The word "prong" itself has uncertain origins but is thought to be related to the Old Norse word "prǫng" meaning "long needle" or "prick".