Foolproof

/ˈfuːlˌpruːf/

Meaning & Definition

adjective

Incapable of failing or making mistakes; guaranteed to succeed.

The instructions provided were so clear that even a beginner could follow them; they were truly foolproof.

Designed to be safe from human error.

The new safety features in the machinery are foolproof, ensuring that accidents are almost impossible.

Simple and easy to use, often to the extent that no special skills are required.

The app has a foolproof interface that anyone can navigate without prior experience.

The term is derived from 'fool' + 'proof', meaning resistant to foolish mistakes.

foolproof plan:

A plan that is unlikely to fail.

foolproof method:

A method that is guaranteed to be effective.

foolproof system:

A system designed to prevent mistakes.

So simple that even a fool can do it.

Programming this app is foolproof; even my grandma could do it.

Guaranteed to succeed without any issues.

This strategy is foolproof – there's no way it can fail.