The word "most decennial" is spelled with the IPA phonetic transcription /məʊst dɪˈsɛniːəl/. Each syllable is pronounced with a vowel sound, and the stress falls on the second syllable. "Most" is pronounced with a long "o" sound followed by the "st" consonant blend. "Decennial" is pronounced with a short "i" sound followed by the "s" sound and a long "e" sound. Together, the word means "most occurring every ten years", referencing a recurring event or anniversary.