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
This melanin is not foolproof in protecting your skin, though.
—
Bruce Y. Lee, Forbes.com, 31 May 2026
Having a beloved couple (Jim and Pam, Cory and Topanga) exchange vows was once a foolproof way to juice TV ratings.
—Judy Berman, Time, 27 May 2026
This is her foolproof method for getting a bathroom spotless in just 30 minutes.
—Aliyah Rodriguez, The Spruce, 27 May 2026
Sundresses are also a foolproof staple for summer.
—Clara McMahon, PEOPLE, 25 May 2026
See All Example Sentences for foolproof
Bruce Y. Lee, Forbes.com, 31 May 2026
Having a beloved couple (Jim and Pam, Cory and Topanga) exchange vows was once a foolproof way to juice TV ratings.
—Judy Berman, Time, 27 May 2026
This is her foolproof method for getting a bathroom spotless in just 30 minutes.
—Aliyah Rodriguez, The Spruce, 27 May 2026
Sundresses are also a foolproof staple for summer.
—Clara McMahon, PEOPLE, 25 May 2026
See All Example Sentences for foolproof
Recent Examples of Synonyms for foolproof
Adjective
-
The Sparks were nearly perfect in the first quarter before committing their first turnover with under five minutes to play.—
Jordan Puente,
Los Angeles Times,
18 June 2026
-
The presidential suite has ergonomic desks and chairs (perfect for a working vacation) and brown leather details that give a cozy feel, plus floor-to-ceiling windows with unparalleled, unobstructed views of the city.—
Condé Nast,
Condé Nast Traveler,
17 June 2026
Adjective
-
Russell’s flawless but natural-looking glam convinced me that Ilia’s Skin Rewind Complexion Stick is the product my everyday makeup routine is missing.—
Kaelin Dodge,
InStyle,
16 June 2026
-
The brain is an extraordinarily complex biological system, and the circuitry responsible for silencing the body during sleep wasn’t optimized for flawless execution.—
Scott Travers,
Forbes.com,
14 June 2026
Adjective
-
The habits already known to support blood and skin health, sleep, nutrition, sun protection, not smoking and managing inflammation, remain the most reliable tools available right now.—
Allison Palmer,
Fort Worth Star-Telegram,
15 June 2026
-
Ferrari’s power unit is much more reliable, but this weekend, its hydraulics weren’t, costing Leclerc a race finish.—
Jonathan M. Gitlin,
ArsTechnica,
15 June 2026
Cite this Entry
“Foolproof.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/foolproof. Accessed 20 Jun. 2026.
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