The word "polest" is not a commonly used word, and it does not appear in any standard dictionaries. However, it is possible to explain its spelling using IPA phonetic transcription. The first three letters "pol" are pronounced with an open-mid back rounded vowel; the "e" is pronounced with a schwa sound; and the final "st" is pronounced with an unvoiced alveolar fricative followed by a voiceless alveolar affricate. This combination of sounds may be used in some dialects or regional variations of English, but it is not standard usage.