biennial /bī-enˈi-əl or -enˈyəl/

1. Lasting two years
2. Happening or appearing once in two years

1. A plant that flowers and fruits only in its second year, then dies
2. An event taking place or being celebrated every two years

biennˈially adverb

• waggeries
• wagger-pagger
• wagger-pagger-bagger
• wagger-pagger-baggers
• waggery
• wagging
• waggish
• waggishly
• waggishness
• waggishnesses
• waggle
• waggled
• waggle dance
• waggle dances
• waggler
• wagglers
• waggles
• wagglier
• waggliest
• waggling
• waggly
• waggon
• waggoned
• waggoner
• waggoners