内ない聞ぶん

noun, noun which may take the genitive case particle 'no'

secret; private; confidential

Refers to information that is kept within a limited circle and not disclosed publicly. Often used in contexts like 内聞にする (keep it secret) or 内聞の話 (a confidential matter).

• この話はなしは内ない聞ぶんにしてください。

  Please keep this matter confidential.

• それは内ない聞ぶんの情じょう報ほうだから、まだ誰だれにも言いわないで。

  That's private information, so don't tell anyone yet.