No security system is foolproof.
Source: tatoeba (945663)
Foolproof
//ˈfuːl ˌpɹuːf//
Synonyms for "foolproof" (63 found)
Ranked by relevance and common usage.
Closest matches (13)
Strong matches (19)
Related words (31)
Related word relations
OpenGloss and ConceptNet supply richer edges like generalizations, collocations, and derivations.
More general
1 entriesSynonyms
1 entriesRelated terms
3 entriesderived
2 entriesderived from
2 entriesrelated to
8 entriessimilar
2 entriesTranslations
18 translations across 14 languages.
Arabic
1 entries- مُحْكَمَة adj ((plan) infallible)
Bulgarian
1 entries- безопасен adj ((device) fail-safe)
Catalan
1 entries- infal·lible adj ((plan) infallible)
Chinese Mandarin
1 entries- 防呆 adj ((device) fail-safe)
Czech
1 entries- blbuvzdorný adj ((device) fail-safe)
Danish
1 entries- idiotsikker adj ((device) fail-safe)
Dutch
2 entries- kogelbestendig adj ((plan) infallible)
- onfeilbaar adj ((plan) infallible)
French
1 entries- infaillible adj ((plan) infallible)
German
2 entries- idiotensicher adj ((device) fail-safe)
- narrensicher adj ((device) fail-safe)
Norwegian Bokmål
1 entries- idiotsikker adj ((device) fail-safe)
Norwegian Nynorsk
1 entries- idiotsikker adj ((device) fail-safe)
Polish
1 entries- idiotoodporny adj ((device) fail-safe)
Spanish
3 entries- a prueba de tontos adj ((device) fail-safe)
- infalible adj ((plan) infallible)
- seguro adj ((device) fail-safe)
Swedish
1 entries- idiotsäker adj ((device) fail-safe)
Sample sentences
9 total sentences available.
Nothing is foolproof to a talented fool.
Source: tatoeba (1233446)
The system is hardly foolproof.
Source: tatoeba (5305588)
But, and yes there is always a but, the plan seemed foolproof until unforeseen complications arose.
Source: tatoeba (11865676)
Showing 4 of 9 available sentences.
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.