他た言ごん無む用よう

expression

keep it secret; mum's the word; not a word to anyone

A set phrase used to warn someone not to tell others; often written on confidential documents or said when sharing a secret.

• この話はなしは他た言ごん無む用ようでお願ねがいします。

  Please keep this story to yourself.

• 封ふう筒とうに「他た言ごん無む用よう」と書かいてあった。

  The envelope had 'Confidential' written on it.