"bead breaker" meaning in English

{
  "forms": [
    {
      "form": "bead breakers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "bead breaker (plural bead breakers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Automotive",
          "orig": "en:Automotive",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Lost in the middle of nowhere, he started to fix it by using his car-jack as a bead breaker, using the weight of the car to \"gently\" separate the bead from the rim."
        }
      ],
      "glosses": [
        "A tool or device used to separate the bead from a tire rim."
      ],
      "id": "en-bead_breaker-en-noun-TCCt8wjF",
      "links": [
        [
          "automotive",
          "automotive"
        ],
        [
          "tool",
          "tool"
        ],
        [
          "bead",
          "bead"
        ],
        [
          "rim",
          "rim"
        ]
      ],
      "raw_glosses": [
        "(automotive) A tool or device used to separate the bead from a tire rim."
      ],
      "topics": [
        "automotive",
        "transport",
        "vehicles"
      ]
    }
  ],
  "word": "bead breaker"
}

{
  "forms": [
    {
      "form": "bead breakers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "bead breaker (plural bead breakers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Automotive"
      ],
      "examples": [
        {
          "text": "Lost in the middle of nowhere, he started to fix it by using his car-jack as a bead breaker, using the weight of the car to \"gently\" separate the bead from the rim."
        }
      ],
      "glosses": [
        "A tool or device used to separate the bead from a tire rim."
      ],
      "links": [
        [
          "automotive",
          "automotive"
        ],
        [
          "tool",
          "tool"
        ],
        [
          "bead",
          "bead"
        ],
        [
          "rim",
          "rim"
        ]
      ],
      "raw_glosses": [
        "(automotive) A tool or device used to separate the bead from a tire rim."
      ],
      "topics": [
        "automotive",
        "transport",
        "vehicles"
      ]
    }
  ],
  "word": "bead breaker"
}