ざざっ

adverb taking the 'to' particle

with a rushing sound; with a whoosh; with a rustle; with a soft rattle

Describes the sound of rain, waves, pouring dry goods like rice, or a light rustling/rattling noise. Often used with と.

• 雨あめがざざっと降ふり出だした。

  The rain started pouring down with a rushing sound.

• 米こめをざざっと研とぐ。

  I wash the rice with a whooshing sound.

adverb taking the 'to' particle

with a sudden collapse; with a clatter

Used when something collapses or falls noisily, or when objects clatter down. Less common than sense 1.

• 積つみ上あげた本ほんがざざっと崩くずれた。

  The piled-up books collapsed with a clatter.

adverb taking the 'to' particle

swarming; surging

Describes a large number of small things (insects, people) moving or appearing suddenly in a swarm. Often used with と.

• 虫むしがざざっと湧わいて出でた。

  Insects came swarming out.

adverb taking the 'to' particle

nimbly; with a dash

Describes a quick, light movement, like dashing or moving nimbly. Rare usage.

• 猫ねこがざざっと走はしり抜ぬけた。

  The cat dashed through nimbly.