The spelling of "peachest" is not correct. The correct word is "peaches", which is pronounced as /ˈpiːtʃɪz/ in IPA phonetic transcription. The plural form of "peach" follows the regular plural rule in English, where an "-es" ending is added to words that end in "ch" or "sh". Therefore, "peaches" is spelled with "es" at the end instead of "est". Knowing the correct spelling and pronunciation of words is important for effective communication.
There seems to be a confusion with the word "peachest". As of my knowledge, "peachest" is not a recognized English word. However, "peach" does have an interesting etymology. The word "peach" originated from the Latin "persica", which was a noun used to describe the fruit. This Latin word was derived from the Greek word "Persikē", which referred to peach trees that were believed to have originated in Persia (present-day Iran). With time, "Persikē" evolved into "persicum" in Latin and later transformed into "peche" in Old French. Eventually, the word entered Middle English as "peche" and later developed into the modern English "peach".