The spelling of the word "STOF" may seem confusing to English speakers, as it is not a commonly used word in the language. However, its spelling can be easily explained using IPA phonetic transcription. The word is pronounced as /stɒf/, which indicates that it starts with an unvoiced "s" sound, followed by a "t" sound, and ends with a short "o" sound and an unvoiced "f" sound. This simple transcription can help one understand and correctly spell the word "STOF."