The spelling of the word "TUTT" uses a unique combination of letters to create the desired sound. The IPA phonetic transcription for "TUTT" is /tʌt/, which indicates that the "t" sound is pronounced with a slightly open "uh" vowel sound. The double "t" in "TUTT" emphasizes the short, sharp sound of the letter "t". This spelling may be unusual, but it effectively conveys the desired sound and is easily recognizable by those familiar with the English language.