"failproof" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "fail",
        "3": "proof"
      },
      "expansion": "fail + -proof",
      "name": "suffix"
    }
  ],
  "etymology_text": "fail + -proof",
  "forms": [
    {
      "form": "more failproof",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most failproof",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "failproof (comparative more failproof, superlative most failproof)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -proof",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Resistant to failure; that cannot go wrong."
      ],
      "id": "en-failproof-en-adj-e2qkCqjp",
      "links": [
        [
          "Resistant",
          "resistant"
        ],
        [
          "failure",
          "failure"
        ],
        [
          "wrong",
          "wrong"
        ]
      ],
      "synonyms": [
        {
          "word": "failureproof"
        }
      ]
    }
  ],
  "word": "failproof"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "fail",
        "3": "proof"
      },
      "expansion": "fail + -proof",
      "name": "suffix"
    }
  ],
  "etymology_text": "fail + -proof",
  "forms": [
    {
      "form": "more failproof",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most failproof",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "failproof (comparative more failproof, superlative most failproof)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms suffixed with -proof"
      ],
      "glosses": [
        "Resistant to failure; that cannot go wrong."
      ],
      "links": [
        [
          "Resistant",
          "resistant"
        ],
        [
          "failure",
          "failure"
        ],
        [
          "wrong",
          "wrong"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "failureproof"
    }
  ],
  "word": "failproof"
}