The correct spelling of the word "Gesham" is with a "sh" and not a "ch". This can be explained through IPA phonetic transcription, where the "sh" sound is represented by the symbol /ʃ/ while the "ch" sound is represented by the symbol /tʃ/. In "Gesham", the "sh" sound is pronounced at the end of the word, making it more fitting than the "ch" sound. It is important to use accurate spelling to correctly convey meaning and avoid confusion.