内証話
also: ないしょばなし
Meanings
1
confidential talk; whispering; secret conversation
rare term
Rare term for a private or whispered conversation, often with a nuance of secrecy. The variant 内緒話 (ないしょばなし) is more common.
See also: 内緒話
The two were having a confidential talk in the corner.
They lowered their voices so the secret conversation wouldn't be heard.