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foolproof
This term describes a level of reliability that transcends mere efficiency, suggesting a design so intuitive or robust that human error cannot compromise the outcome. It carries a strong connotation of absolute certainty and security, often used in technical, mechanical, or procedural contexts to describe systems that eliminate the possibility of a mistake.
While it is frequently used in professional settings to describe software or safety protocols, it can also appear in casual conversation to describe a plan or strategy that is perceived as guaranteed to succeed. It differs from words like reliable or dependable by implying that the system actively prevents failure rather than just resisting it.
Meanings
Examples
The new software update is virtually foolproof.
I need a foolproof plan to get us through the border without any delays.
This recipe is foolproof even for someone who has never cooked before.
Is there a foolproof way to ensure the data is backed up every hour?
The locking mechanism is designed to be foolproof.
I thought the security system was foolproof until the thief found a loophole.
The instructions are so simple they are practically foolproof.
The instructions are so simple they are practically foolproof.