foolproof
Americanadjective
-
involving no risk or harm, even when tampered with.
-
never-failing.
a foolproof method.
adjective
-
proof against failure; infallible
a foolproof idea
-
(esp of machines) proof against human misuse, error, etc
Etymology
Origin of foolproof
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
For the people on your list who warrant a little extra effort — and perhaps a slightly expanded budget — I offer a reliably foolproof formula: one handmade element, paired with one small store-bought companion.
From Salon
Leaders said grabbing sovereign assets would set a dangerous precedent and that a complex plan prepared by the European Union wasn’t foolproof.
A government-funded, industry-run trial looked at the main methods of age assurance and earlier this year reported all were technically possible – but none were foolproof and all carried risks.
From BBC
Supporters of the birth dose say that screening efforts aren’t foolproof.
“Those can be defeated but that can take a lot of time,” Sutter said.”It’s not foolproof but at least it’s a strong deterrent.”
From Los Angeles Times
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
