The spelling of the word "stumph" may seem unusual to some readers, but it follows the rules of English phonetics. The IPA transcription for this word is /stʌmpf/, indicating that the "u" sound is pronounced like in the word "up" and the "ph" is actually a single consonant cluster pronounced like "f". The added "h" serves to show that the final consonant is voiced, creating the distinguishing sound of this word. While uncommon, H is used in English to show the pronunciation of voiced consonant sounds in contrast to their unvoiced counterparts.