The spelling of the word "pouchest" may seem confusing, but it can be explained using IPA phonetic transcription. The word is pronounced as /pɑːʊʃəst/, with the stress on the first syllable. The "ou" sound represents the diphthong /aʊ/, which is pronounced as a combination of the sounds /a/ and /ʊ/. The "-est" ending indicates the superlative form of the adjective "pouch", meaning "having or forming a pouch". Therefore, "pouchest" means "most pouch-like".