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Adjective: foolproof  'fool,proof
  1. Not liable to failure
    "a foolproof identification system";
    - unfailing
Verb: foolproof  'fool,proof
  1. Proof against human misuse or error
    "foolproof this appliance";
    - goofproof, goof-proof

Derived forms: foolproofed, foolproofing, foolproofs

See also: infallible

Type of: proof

Encyclopedia: Foolproof