"understructure" meaning in English

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        "3": "structure"
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      "expansion": "under- + structure",
      "name": "prefix"
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  ],
  "etymology_text": "From under- + structure.",
  "forms": [
    {
      "form": "understructures",
      "tags": [
        "plural"
      ]
    }
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      "args": {},
      "expansion": "understructure (plural understructures)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "antonyms": [
        {
          "word": "superstructure#Noun"
        }
      ],
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      "examples": [
        {
          "text": "Holonym: infrastructure (facilities sense)"
        },
        {
          "text": "Near-synonyms: infrastructure (foundations sense), underpinnings"
        },
        {
          "ref": "2008 January 22, Kirk Johnson, “Strength Renewed, a Grand Old Building Is Back”, in New York Times:",
          "text": "Four small suspension bridges, complete with towers and cables like those on the span across the East River, are now encased inside the Capitol’s subbasement understructure.",
          "type": "quote"
        }
      ],
      "glosses": [
        "The supporting structure underneath something, such as a vehicle or bridge."
      ],
      "id": "en-understructure-en-noun-0GxdoMa3",
      "links": [
        [
          "structure",
          "structure"
        ],
        [
          "vehicle",
          "vehicle"
        ],
        [
          "bridge",
          "bridge"
        ]
      ]
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  "word": "understructure"
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        "2": "under",
        "3": "structure"
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      "expansion": "under- + structure",
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    }
  ],
  "etymology_text": "From under- + structure.",
  "forms": [
    {
      "form": "understructures",
      "tags": [
        "plural"
      ]
    }
  ],
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      "expansion": "understructure (plural understructures)",
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  "lang_code": "en",
  "pos": "noun",
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        {
          "word": "superstructure#Noun"
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        {
          "text": "Holonym: infrastructure (facilities sense)"
        },
        {
          "text": "Near-synonyms: infrastructure (foundations sense), underpinnings"
        },
        {
          "ref": "2008 January 22, Kirk Johnson, “Strength Renewed, a Grand Old Building Is Back”, in New York Times:",
          "text": "Four small suspension bridges, complete with towers and cables like those on the span across the East River, are now encased inside the Capitol’s subbasement understructure.",
          "type": "quote"
        }
      ],
      "glosses": [
        "The supporting structure underneath something, such as a vehicle or bridge."
      ],
      "links": [
        [
          "structure",
          "structure"
        ],
        [
          "vehicle",
          "vehicle"
        ],
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          "bridge",
          "bridge"
        ]
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  "word": "understructure"
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