HSK V7-9
Correct

隐情

/ yǐnqíng / 
Strokes

Definition

sth one wishes to keep secret/ulterior motive/a subject best avoided

Example

As a Noun
unmentionable secret; fact/reason one wishes to hide
1
Bùzhǎng
部长
tūrán
突然
chèn
称
bìng
病
cízhí
辞职
  
,
qízhōng
其中
bì
必
yǒu
有
yǐnqíng
隐情
  
。

The minister unexpectedly resigned on the pretext of illness. There must be some other reason behind it.

2
Shuō
说
chū
出
yǐnqíng
隐情

tell a secret

3
Diàochá
调查
yǐnqíng
隐情

enquire into the hidden facts