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
-
Its beaches, such as Playa Alicia and Playa Dorada, are perfect for sun and sea lovers, while its proximity to Cabarete, a surfer's paradise, makes this locale even more attractive.—
Condé Nast Traveler,
Condé Nast Traveler,
11 June 2026
-
Young boys, some no older than five or six, showed off their marksmanship by throwing reeds like spears with perfect accuracy, and the men demonstrated their precision with bow and arrow.—
Literary Hub,
Literary Hub,
11 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
-
China, by contrast, now leads production for 30 of the 44 critical minerals for which there are reliable estimates, commands an average market share of over 70% for strategic minerals, and accounts for 93% of magnet manufacturing.—
Jared Cohen,
Time,
15 June 2026
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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
Cite this Entry
“Foolproof.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/foolproof. Accessed 17 Jun. 2026.
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