"sale-proof" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "sale",
        "3": "proof"
      },
      "expansion": "sale + -proof",
      "name": "suffix"
    }
  ],
  "etymology_text": "From sale + -proof.",
  "forms": [
    {
      "form": "more sale-proof",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most sale-proof",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "sale-proof (comparative more sale-proof, superlative most sale-proof)",
      "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"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "That used car has one thing going for it: it is sale-proof.",
          "type": "example"
        }
      ],
      "glosses": [
        "Nearly impossible to sell to others."
      ],
      "id": "en-sale-proof-en-adj-9zos4WWQ",
      "raw_glosses": [
        "(colloquial) Nearly impossible to sell to others."
      ],
      "tags": [
        "colloquial"
      ]
    }
  ],
  "word": "sale-proof"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "sale",
        "3": "proof"
      },
      "expansion": "sale + -proof",
      "name": "suffix"
    }
  ],
  "etymology_text": "From sale + -proof.",
  "forms": [
    {
      "form": "more sale-proof",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most sale-proof",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "sale-proof (comparative more sale-proof, superlative most sale-proof)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English colloquialisms",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English terms suffixed with -proof",
        "English terms with usage examples",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "text": "That used car has one thing going for it: it is sale-proof.",
          "type": "example"
        }
      ],
      "glosses": [
        "Nearly impossible to sell to others."
      ],
      "raw_glosses": [
        "(colloquial) Nearly impossible to sell to others."
      ],
      "tags": [
        "colloquial"
      ]
    }
  ],
  "word": "sale-proof"
}