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
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And all the various mysteries come to a head in the final two episodes and are wrapped up nicely.—
Erik Kain,
Forbes.com,
3 Sep. 2025 -
Let’s delve into the 11 most compelling UFO sightings across the globe – incidents with documentation, official investigation, and mysteries that have persisted for decades despite analysis.—
Atharva Gosavi,
Interesting Engineering,
3 Sep. 2025
Noun
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Each linguistic slip is a chance for Nabokovian adjectives to bloom, for Lockwood’s poetic puzzles to click into place.—
Literary Hub,
Literary Hub,
4 Sep. 2025
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Players will visit stunning new locations, solve intricate puzzles, battle dangerous cultists, and encounter an epic new enemy in a classically thrilling Indiana Jones adventure.—
Griff Griffin,
MSNBC Newsweek,
3 Sep. 2025
Noun
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In her latest Jo + Tiny Mic series on Instagram, the Texas native shared four of her favorite secrets to instantly elevate a room, and the principles can be perfectly applied to your fall home decor using Gaines’ very own Magnolia collection at Target.—
Stephanie Osmanski,
Better Homes & Gardens,
9 Sep. 2025
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As war rages in Europe, the two children navigate danger and secrets that challenge their understanding of family and friendship, reshaping their childhoods forever.—
Elsa Keslassy,
Variety,
8 Sep. 2025
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Cite this Entry
“Closed books.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/closed%20books. Accessed 10 Sep. 2025.
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