ざあっ

adverb, noun

sound of water rushing or splashing

Onomatopoeia for a sudden, forceful rush of water, such as a downpour, a wave, or water being poured. Often used adverbially with と or as a noun-like sound effect.

See also: ザーザー

• 雨あめがざあっと降ふり出だした。

  The rain suddenly started pouring down.

• バケツの水みずをざあっとまく。

  I splash a bucket of water with a whoosh.