bianual.
biannual (not to be confused with biennial)
Meaning & usage
biannual (not to be confused with biennial)
Where this word comes from
Etymology tree Proto-Indo-European *dwóh₁ Proto-Indo-European *dwi- Proto-Italic *dwi- Latin bi-der. Proto-Indo-European *dwóh₁ ▲ Proto-Indo-European *trísinflu. Proto-Indo-European *dwís Proto-Italic *dwis Old Latin duis Latin bisder. Spanish bi- Proto-Indo-European *h₂et- Proto-Indo-European *-nós Proto-Indo-European *h₂etnós Proto-Italic *atnos? Latin annus Proto-Indo-European *-wós Proto-Italic *-wos Latin -uus Latin annuus Proto-Indo-European *h₂el- Proto-Indo-European *-is Proto-Indo-European *h₂élisder.? Proto-Italic *-ālis Latin -ālis Late Latin annuālisbor. Spanish anual Spanish bianual From bi- + anual.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.