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

• grisly
• grison
• grisons
• grissini
• grissino
• grist
• gristle
• gristles
• gristlier
• gristliest
• gristliness
• gristlinesses
• gristly
• grist-mill
• grist-mills
• grists
• grist to the mill
• grisy
• grit
• grit blasting
• grith
• griths
• grith-stool
• grith-stools
• grits