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
Synonyms & Similar Words
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Example Sentences
Recent Examples of Synonyms for closed books
Noun
-
These are some of life’s great mysteries.—
Hannah Madlener,
Glamour,
24 Apr. 2026 -
Balls and strikes are simple, at least compared to the mysteries of goalie interference.—
Sean McIndoe,
New York Times,
24 Apr. 2026
Noun
-
Check out the all new PLAY hub with puzzles, games and more!—
Kathleen Wong,
USA Today,
29 Apr. 2026
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Apple works at this vertiginous juncture where Emily Dickinson goes rumbling into Etta James and, lately, Beyoncé; where Nico solves puzzles with Randy Newman, Kurt Weill, Nina Simone and the Beatles.—
New York Times,
New York Times,
28 Apr. 2026
Noun
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But the hyper-specificity and confrontation on these albums form real connection, creating the feeling that the listener is being trusted with someone else’s secrets and struggles — and safe to embrace their own, too.—
Larisha Paul,
Rolling Stone,
2 May 2026
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Over the course of the day and evening, old secrets, resentments, and regrets bubble up to the surface and Altman crafts a devastating meditation on memory, identity, and the necessity as well as the danger of a vivid fantasy life.—
Jim Hemphill,
IndieWire,
1 May 2026
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Cite this Entry
“Closed books.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/closed%20books. Accessed 3 May. 2026.
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