Thesaurus results for CLOSED BOOKS

closed books

noun

plural of closed book

as in mysteries

something hard to understand or explain the couple's unorthodox marriage is definitely a closed book to those outside of the relationship

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Noun

There’s much still to learn about this meteorite’s mysteries, says Anya Udry, a planetary scientist at the University of Nevada, Las Vegas, who was not involved with the Science study.

— Mary Randolph, Scientific American, 29 Oct. 2026
An unassuming spinster settled in the English countryside, the majority of Miss Marple's mysteries have taken place right in her own backyard.

— Kat Chen, Condé Nast Traveler, 27 Oct. 2026

Definition of mysteries

Noun

Each season sees 12 contestants engaged in competitive and cooperative tasks that push the mental envelope, with overarching metagames, hidden puzzles, and lots of intrigue.

— K. Thor Jensen, PC Magazine, 6 Nov. 2026
After warming up on the math puzzles, Goodfire then tasked the AIs with chess challenges.

— Harry Booth, Time, 5 Nov. 2026

Definition of puzzles

Noun

Horrifying family secrets emerged, and even worse, vile Eddie started dating Harry’s chronically-moody teenage daughter Gina (Teddie Allen).

— Antonia Blyth, Deadline, 12 Nov. 2026
One member of a relationship accidentally spills secrets because they get seduced by someone pretending to be the other member of their relationship.

— Roxana Hadadi, Vulture, 12 Nov. 2026

Definition of secrets

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“Closed books.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/closed%20books. Accessed 14 Nov. 2026.

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Synonyms of closed books

noun

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