The correct spelling of the past tense of "speed" is "sped". However, some people use "speeded" instead. The IPA phonetic transcription for "most speeded" is /moʊst spiːdɪd/. The "o" in "most" is pronounced as the "oh" sound in "go". "Speeded" is pronounced with a long "ee" sound, represented by the "iː" symbol. Overall, while "most speeded" may be used in some contexts, "most sped" is the standard and more widely accepted form.
The word "most speeded" does not have its own distinct etymology as it is a combination of two words: "most" and "speeded".
The word "most" is derived from the Old English word "mǣst", which means "greatest" or "utmost". It has Germanic origins and is related to the Old High German word "meist" and the Gothic word "maists". Over time, "most" has evolved to function as an adverb of degree, indicating a superlative form.
The word "speeded" is the past tense and past participle form of the verb "speed". "Speed" comes from the Middle English word "spede", which can be traced back to the Old English word "spēd", meaning "success" or "prosperity".