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foolproof

foolproof

34 3.9
Very simple and reliable so people cannot use it wrongly
  • adjective
  • /ˈfuːlpruːf/
: infalible
  • The chef offered a foolproof recipe that even beginners could follow successfully.
  • a foolproof way
  • a foolproof method
  • a foolproof system

But I mean, it's still, it's not foolproof, right?

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Examples

  • My plan is foolproof, gentlemen.

  • There is no foolproof way to cover everything.

  • All we found out so far is their foolproof plan for getting it passed.

  • I have the foolproof plan.

  • The security around Powers is foolproof.

  • And while there is no foolproof formula, there are a few "rules of the road."

    Academic text (2010)
  • Of course, no immigration system can be completely foolproof, but it does not have to be.

    Academic text (2002)
  • It's a really foolproof way of doing a classic, beautiful smoky eye.

  • It's foolproof, we'll be unstoppable.

  • A system doesn't have to be absolutely foolproof; it just has to be fool-resistant.

    Blog text (20)

Synonyms

reliable
vsfoolproof
342 2.7

Able to be trusted to do what is expected

stresses simplicity that prevents mistakes, not just consistent performance
airtight
vsfoolproof
29 5.9

A very strong argument or plan that has no weak points

applies to simple secure designs rather than irrefutable arguments
fail-safe
vsfoolproof
  • Specialized
17 5.6

Designed to work safely if something goes wrong

focuses on simple reliable design that cannot be used incorrectly
sure-fire
vsfoolproof
13 4.4

Certain to work and bring success

aims for simplicity and errorproof use rather than only success
unfailing
vsfoolproof
5 4.9

Always reliable and steady

focuses on preventing wrong use and design simplicity instead of constancy
bulletproof
vsfoolproof
5 5.8

Hard to prove wrong

targets easy, mistake-proof operation rather than argument invulnerability
idiot-proof
vsfoolproof
  • Informal
2 3.9

Easy for anyone to use without help

combines simplicity and reliability to stop incorrect use

Antonyms

187 3.7

Not perfect because of a mistake or problem

2 5.1

Tends to make many mistakes

How Reliable

foolproof
34 3.9
fail-safe
  • Specialized
17 5.6
reliable
342 2.7
robust
120 3.9

Surface Forms

foolproof positive

Morphology

foolproof = fool + proof (transparent) = fool + proof

The meaning 'resistant to fools' directly follows from the compound parts 'fool' + 'proof', which is a productive '...-proof' construction.

Etymology

Foolproof comes from joining fool and proof, where proof means 'resistant to'—think of waterproof or bulletproof. So something foolproof is made 'resistant to' mistakes or careless people, meaning it is so simple or safe that it cannot go wrong.