The word "most octennial" is spelled using the IPA phonetic transcription as /moʊst ɒkˈtɛniəl/. The first part of the word, "most," is pronounced with a long "o" sound and a soft "s" at the end. The second part, "octennial," is pronounced with the emphasis on the second syllable and with a hard "c" sound in the first syllable. The word refers to something that happens once every eight years, making it a useful word for describing events such as political elections or anniversaries.