しゅー

adverb taking the 'to' particle, adverb

hiss; swish; whoosh; whiz; fizzle; sputter

Mimetic word for a sharp, continuous sound of air, steam, or liquid escaping under pressure. Often used with と.

• やかんがしゅーと音おとを立たてて湯ゆ気げを出だしている。

  The kettle is hissing and letting out steam.