The word "gumbleton" may seem confusing at first glance, but its spelling can be explained using IPA phonetic transcription. The initial "g" sound is followed by the "uh" sound as in "umbrella" and then the "m" sound. The next syllable starts with the "b" sound and is followed by the "uh" sound again. The final syllable starts with the "t" sound and is followed by the "uh" and "n" sounds. Therefore, the correct spelling of "gumbleton" is as follows: /ˈɡʌmbəltən/.