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

• penchant
• penchants
• pencil
• pencil-case
• pencil-cases
• pencil-cedar
• pencil-cedars
• pencil-compass
• pencil-compasses
• penciling
• pencil-lead
• pencil-leads
• pencilled
• penciller
• pencillers
• pencilling
• pencillings
• pencil moustache
• pencil moustaches
• pencil-ore
• pencil-pusher
• pencils
• pencil-sharpener
• pencil-sharpeners
• pencil-sketch