as in perfect
done, made, or planned so well that nothing can go wrong
a foolproof plan DNA fingerprinting gives police a virtually foolproof way to link a suspect to a crime scene.
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Recent Examples of foolproof
The only foolproof way to fully kill bacteria on your greens, per Gavin?
—
Danielle Zickl, Health, 26 Sep. 2025
While not foolproof – replication failures can occur due to human error, inaccurate details of study design and many other variables that may be difficult to control for – results that remain unproven are a huge red flag.
—New Atlas, 24 Sep. 2025
None of this, of course, provides a foolproof hedge against the risk of Trump making concessions on Taiwan in exchange for a trade deal or a better relationship with Xi.
—Philip H. Gordon, Foreign Affairs, 22 Sep. 2025
Available in four natural-looking shades that are neither too red nor too gray, this whisper-soft powder offers a foolproof way to accentuate your arches and create the illusion of fullness without the reality of smudges or streaks.
—Sophia Panych, Allure, 16 Sep. 2025
See All Example Sentences for foolproof
Danielle Zickl, Health, 26 Sep. 2025
While not foolproof – replication failures can occur due to human error, inaccurate details of study design and many other variables that may be difficult to control for – results that remain unproven are a huge red flag.
—New Atlas, 24 Sep. 2025
None of this, of course, provides a foolproof hedge against the risk of Trump making concessions on Taiwan in exchange for a trade deal or a better relationship with Xi.
—Philip H. Gordon, Foreign Affairs, 22 Sep. 2025
Available in four natural-looking shades that are neither too red nor too gray, this whisper-soft powder offers a foolproof way to accentuate your arches and create the illusion of fullness without the reality of smudges or streaks.
—Sophia Panych, Allure, 16 Sep. 2025
See All Example Sentences for foolproof
Recent Examples of Synonyms for foolproof
Adjective
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Depending on the geometry, this can stretch the background galaxy in arcs, duplicate it into multiple images or form near-perfect circles called Einstein rings.—
Kenna Hughes-Castleberry,
Space.com,
10 Oct. 2025
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The noodles are then served in a cute yellow and green to-go container, perfect for your Instagram story.—
Keith Pandolfi,
Cincinnati Enquirer,
10 Oct. 2025
Adjective
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The 403-foot-tall (124-meter) vehicle lifted off from SpaceX’s Starbase facility in South Texas and completed a flawless mission.—
Kaif Shaikh,
Interesting Engineering,
15 Oct. 2025
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The dual-sided mirror comes with flattering lighting for flawless makeup application, and its compact size is just right for a vanity or bathroom counter that could use some serious tidying.—
Mariana Best,
Better Homes & Gardens,
10 Oct. 2025
Adjective
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Shoppers also find cotton jeans to be the most sustainable or environmentally friendly (67 percent), the most authentic (64 percent), the highest quality (58 percent), the longest lasting (51 percent) and the most reliable (50 percent).—
Footwear News,
Footwear News,
15 Oct. 2025
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Stephanie Smith, a spokesperson from I&M, stressed that the utility’s energy mix is designed to provide safe, reliable and clean power customers can count on around the clock in a statement.—
Sophie Hartley,
IndyStar,
14 Oct. 2025
Cite this Entry
“Foolproof.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/foolproof. Accessed 17 Oct. 2025.
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