Stuck inside a drum
To have others conceal the truth about things happening in one's life; to not be in the know
Neutral
关于他的计划我完全蒙在鼓里 | Guānyú tā de jìhuà wǒ wánquán méngzàigǔlǐ
I'm completely in the dark regarding his plans
[Source]
妻子出轨近半年,丈夫一直蒙在鼓里,直到妻子脖子上的一个吻痕导致东窗事发 | Qīzi chūguǐ jìn bànnián, zhàngfū yīzhí méngzàigǔlǐ, zhídào qīzi bózi shàng de yīgè wěnhén dǎozhì dōngchuāngshìfā
He was completely in the dark about the fact that his wife had been unfaithful for over half a year. Then, the truth was exposed when he discovered the hickey on her neck
[Source]
To be in the dark; to be kept in the dark
None
None
《瞎骗奇闻》(Shā Piàn Qí Wén) by 吴趼人 (Wú Jiǎn Rén), a novelist from the Qīng Dynasty (清, 1644 - 1911)
This chengyu is from a line in the work listed in the "Origin" section above