closed book (Meaning)

Wordnet

closed book (n)

something that baffles understanding and cannot be explained

Despite his efforts, her thoughts remained a closed book to him.
The topic of quantum physics was a closed book to most of the class.
He was like a closed book, never revealing much about his personal life.
Her feelings towards him were a closed book, leaving him unsure of where he stood.
The history of the ancient civilization was a closed book until the recent archaeological discoveries.
The new software was a closed book to him until he attended the training session.
The intricate workings of the human brain were a closed book to even the most knowledgeable scientists.
The mystery surrounding the disappearance of the famous explorer remained a closed book for decades.
She kept her emotions tightly guarded, like a closed book with no pages to turn.
Despite his best efforts, understanding her motivations was a closed book that he couldn't decipher.

something that baffles understanding and cannot be explained

mystery, riddle, why, secret, mystification, matter, challenge, enigma, conundrum,puzzle

No antonyms found.

Despite his efforts, her thoughts remained a closed book to him.

The topic of quantum physics was a closed book to most of the class.

He was like a closed book, never revealing much about his personal life.

Her feelings towards him were a closed book, leaving him unsure of where he stood.