foolproof
Translation
foolproof, infallible, failsafe
Examples
The new system is completely foolproof.
The new system is completely foolproof.
She created a foolproof plan.
She created a foolproof plan.
Grammar Patterns
before a ((noun)) Used before a noun to modify it She has a foolproof method.
after 'to be' Used as a predicative adjective The instructions are foolproof.
Similar Words
Synonyms: infallible, failsafe, guaranteed; Antonyms: fallible, risky
Etymology
A compound of 'fool' and 'proof' (meaning resistant to). It describes something so simple or well-designed that even a fool cannot misuse it or make it fail.
Memory Tips
Think of 'waterproof' which is resistant to water. Similarly, 'foolproof' is resistant to fools making mistakes with it.