ヒソヒソ hiso hiso (en) - matsumurae/onomatodict-jp GitHub Wiki

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1. Whispering. Speak in a low voice so that others cannot hear them. (It doesn't mean they are talking behind the backs of those in the immediate vicinity)
2. Doing something secretly so that others don't notice.

• Type: Gitaigo (擬態語)
• Category: Speak.
• Equivalent: Whisper.
• Source:
  • https://www.facebook.com/nihongonote2/photos/japanese-onomatopoeia%E3%81%B2%E3%81%9D%E3%81%B2%E3%81%9Dhisohisowhisper-%E3%81%82%E3%81%AE%E4%BA%8C%E4%BA%BA%E3%81%AF%E3%81%84%E3%81%A4%E3%82%82%E6%8E%88%E6%A5%AD%E4%B8%AD%E3%81%B2%E3%81%9D%E3%81%B2%E3%81%9D%E8%A9%B1%E3%81%97%E3%81%A6%E3%81%84%E3%81%BE%E3%81%99%E3%81%93%E3%81%9D%E3%81%93%E3%81%9Dkosokososecret/424696344948206/
  • https://nihon5-bunka.net/onomatopoeia-hisohiso/

Usage

〜（と）話す
~ speak in whispers; talk in a low voice.

〜（と）陰謀を企む
~ hatch a plot in secret.

Examples

あの人たちはいつも二人でヒソヒソ噂話をしている
Those two are always gossiping in whisper.

友人は新しいビジネスの準備を、ヒソヒソと進めている
My friend is quietly preparing (to leave) for a new business venture.

Related

• Koso-Koso / こそこそ