The spelling of the word "Stoutner" can be explained using IPA phonetic transcription. The first syllable "Stou" is pronounced as /staʊ/, with the "ou" sound used in "out". The second syllable "tner" is pronounced as /tnər/, with the "t" being silent and the "er" pronounced with a reduced, unstressed sound. Therefore, the correct spelling of this word is "Stoutner". Phonetic transcriptions provide a helpful tool for understanding the correct pronunciation and spelling of words.