octennial /ok-tenˈyəl, -i-əl/

1. Happening every eighth year
2. Lasting eight years

octennˈially adverb

• mistuned
• mistunes
• mistuning
• mist up
• misty
• misunderstand
• misunderstanding
• misunderstandings
• misunderstands
• misunderstood
• misusage
• misusages
• misuse
• misused
• misuser
• misusers
• misuses
• misusing
• misust
• misventure
• misventures
• misventurous
• miswandred
• misween
• misweened