tidal wave

The Simple English Wikipedia has an article on:

Tsunami

Pronunciation

• (UK) enPR: so͞o-nä'mi or tso͞o-nä'mi, IPA ^(key): /suːˈnɑːmi/ or /tsuːˈnɑːmi/
• (US) enPR: so͞o-nä'mi or tso͞o-nä'mi, IPA ^(key): /suˈnɑmi/ or /tsuˈnɑmi/
• (Canada) IPA ^(key): /suˈnæmi/ or /suˈnɑmi/

• Audio (UK)

  (file)

Noun

Singular tsunami

Plural tsunamis or tsunami

1. (countable) A tsunami is a very large water wave formed in the ocean and can destroy buildings and people, usually due to an earthquake or volcanic eruption.