F f


    • US Pronunciation
    • US IPA
    • UK Pronunciation
    • UK IPA
    • [fool-proof]
    • /ˈfulˌpruf/
    • /ˈfuːl.pruːf/
    • US Pronunciation
    • US IPA
    • [fool-proof]
    • /ˈfulˌpruf/

Definitions of foolproof word

  • adjective foolproof involving no risk or harm, even when tampered with. 1
  • adjective foolproof never-failing: a foolproof method. 1
  • noun foolproof Incapable of going wrong or being misused. 1
  • adjective foolproof that cannot be misused 1
  • adjective foolproof that cannot fail 1
  • adjective foolproof Something such as a plan or a machine that is foolproof is so well designed, easy to understand, or easy to use that it cannot go wrong or be used wrongly. 0

Information block about the term

Origin of foolproof

First appearance:

before 1900
One of the 17% newest English words
An Americanism dating back to 1900-05; fool1 + -proof

Historical Comparancy

Parts of speech for Foolproof


foolproof popularity

A common word. It’s meaning is known to most children of preschool age. About 75% of English native speakers know the meaning and use the word.
This word is included in each student's vocabulary. Most likely there is at least one movie with this word in the title.

foolproof usage trend in Literature

This diagram is provided by Google Ngram Viewer

Synonyms for foolproof

adj foolproof

  • flawless — having no defects or faults, especially none that diminish the value of something: a flawless Ming Dynasty vase.
  • reliable — that may be relied on or trusted; dependable in achievement, accuracy, honesty, etc.: reliable information.
  • sure-fire — sure to work; foolproof: a surefire moneymaking scheme.
  • unassailable — not open to attack or assault, as by military force or argument: unassailable fortifications; unassailable logic.
  • perfect — conforming absolutely to the description or definition of an ideal type: a perfect sphere; a perfect gentleman.

adjective foolproof

  • secure — free from or not exposed to danger or harm; safe.

Antonyms for foolproof

adjective foolproof

  • risky — attended with or involving risk; hazardous: a risky undertaking.

Top questions with foolproof

  • what does foolproof mean?
  • what is foolproof?
  • what is the meaning of foolproof?

See also

Matching words

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