The spelling of the word "hoarest" is not very straightforward, with the combination of letters leading to multiple possible pronunciations. In IPA phonetic transcription, the word is pronounced /ˈhɔr-ɪst/, with a stressed "haw" sound followed by an "uh" sound and the "r" sound. The "-est" ending is pronounced as a separate syllable with an "ih" sound and an "st" sound. While the spelling of "hoarest" may seem confusing, understanding its IPA phonetic transcription can help people pronounce it correctly.
The word "hoarest" does not have an etymology on its own as it is not a stand-alone word in English. However, if you are referring to the word "hoar" or "hoary", then the etymology can be explored.
The word "hoar" or "hoary" has its origins in the Old English word "hār", which means "gray" or "covered with gray hair". It is related to the Old Norse word "hárr" and the Old High German word "hēr", both of which also mean "gray".
Over time, "hoar" in English developed additional meanings, including "frost" or "covered with frost". "Hoar" can be found in various compound words like "hoarfrost" (white frost formed by the freezing of water vapor in the air) and "hoary" (gray or white with age).