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

• skinned
• skinner
• skinners
• skinnier
• skinniest
• skinniness
• skinninesses
• skinning
• skinny
• skinny-dip
• skinny-dipped
• skinny-dipper
• skinny-dippers
• skinny-dipping
• skinny-dips
• skinny latte
• skinny-rib
• skinny-ribs
• skin-pop
• skin-popped
• skin-popper
• skin-poppers
• skin-popping
• skin-pops
• skins