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a closed book

Idiom Literature

Meaning

something or someone that is difficult to understand

Example Sentences

"He’s a closed book when it comes to his personal life."

Related Expressions

own up to your mistakes

to admit that you have done something wrong

Dig deeper

To investigate more thoroughly or find out more details.

ghost in the machine

a mysterious or unexplained force in a system or person

climbing the ladder

to improve one's position, typically in a career or personal...

blow off steam

to express anger or frustration so that you feel better

kill two birds with one stone

to succeed in achieving two things in a single action