不ふ告こく

noun

something concealed; something not disclosed

Refers to a matter that is kept hidden or not revealed. Often used in formal or written contexts.

• 彼かれには不ふ告こくの事じ実じつがあるようだ。

  It seems he has something he is not disclosing.

• 不ふ告こくのままでは信しん頼らいを失うしなう。

  If you keep things concealed, you will lose trust.