biennial C2+ Topic:Describing Qualities US /baɪˈɛniəl/ UK /baɪˈɛniəl/ See IPA manual Meanings 1 adj happening every two years, or lasting for two years The biennial arts festival draws visitors from across the continent. Thesaurus Synonyms 1 adj · happening every two years,... biyearlytwo-yearly ↔ Opposites annualperennial Word family Derived forms biennially Related forms annualperennialbiannualtriennial Etymology AI details From Latin biennium ('a period of two years'), from bi- ('two') + annus ('year'). bi- Latin annus Latin View etymology graph -> Topics Describing Qualities Gardening & Horticulture Word Formation & Derivatives External links Google Images Cambridge Dictionary Wiktionary # biennial **Type:** Word **Level:** C2+ **Part of speech:** adj **IPA (US):** /baɪˈɛniəl/ **IPA (UK):** /baɪˈɛniəl/ ## Meanings 1. happening every two years, or lasting for two years ## Examples - The biennial arts festival draws visitors from across the continent. ## Synonyms - biyearly - two-yearly ## Antonyms - annual - perennial ## Derived Forms - biennially ## Related Forms - annual - perennial - biannual - triennial ## Roots and Affixes - Root: bi- - Root: annus ## Etymology From Latin biennium ('a period of two years'), from bi- ('two') + annus ('year'). ## AI Etymology Biennial is an adjective and noun meaning "happening every two years, or lasting for two years". Historically, it is from Latin biennium ('a period of two years'), from bi- ('two') + annus ('year'). The visible construction is part of the etymology: biennial is not just an unanalyzed simple word. The historical chain links Latin bi- with Latin annus. Close English family members include biennially, annual, perennial, biannual, and triennial. ## Topics - Describing Qualities - Gardening & Horticulture - Word Formation & Derivatives markdown