megatsunami.
An extremely large tsunami-like wave caused by an avalanche or landslide displacing large amounts of water very quickly.
Meaning & usage
An extremely large tsunami-like wave caused by an avalanche or landslide displacing large amounts of water very quickly.
A very large tsunami.
Where this word comes from
Etymology tree Proto-Indo-European *méǵh₂s Proto-Hellenic *mégas Ancient Greek μέγᾰς (mégăs)der. English mega- Japanese 津波 (tsunami)bor. English tsunami English megatsunami From mega- + tsunami.
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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.