"bulder" meaning in Middle English

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      "expansion": "Old Swedish *buldersten",
      "name": "der"
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        "3": "bulder",
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  "etymology_text": "Short for bulder ston (“a stone that's been worn into a round shape, boulder, cobblestone”), possibly from Old Swedish *buldersten, itself possibly from Old Swedish bulder (“rumble, noise”) + sten (“stone”);",
  "forms": [
    {
      "form": "bulders",
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      "form": "buldyrys",
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  "lang_code": "enm",
  "pos": "noun",
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    {
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        "A stone worn round, boulder, cobblestone."
      ],
      "id": "en-bulder-enm-noun-cW~hX5Rb",
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      "synonyms": [
        {
          "word": "buldir"
        }
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  ],
  "sounds": [
    {
      "ipa": "/ˈbuldər/"
    }
  ],
  "word": "bulder"
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          "word": "byldere"
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          "byldere#Middle_English"
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  "word": "bulder"
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  "pos": "noun",
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        "A stone worn round, boulder, cobblestone."
      ],
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          "boulder",
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    {
      "ipa": "/ˈbuldər/"
    }
  ],
  "synonyms": [
    {
      "word": "buldir"
    }
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  "word": "bulder"
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