"갈두" meaning in Middle Korean

{
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      "expansion": "갈두 (Galdu)",
      "name": "ko-l"
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    {
      "args": {
        "1": "^갈머리"
      },
      "expansion": "갈머리 (Galmeori)",
      "name": "ko-l"
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    {
      "args": {
        "1": "머리"
      },
      "expansion": "머리 (meori)",
      "name": "ko-l"
    }
  ],
  "etymology_text": "Probably from 갏 (kalh, “knife”) + Sino-Korean 두(頭) (twu, “head, tip”), in reference to the shape of the peak. There are still about a dozen attested locales called 갈두 (Galdu) in modern Korea, most of which are also called 갈머리 (Galmeori) using the native alternative 머리 (meori) for \"head\".",
  "forms": [
    {
      "form": "갈두〮",
      "tags": [
        "canonical"
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      "form": "Kàltwú",
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        "romanization"
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      "expansion": "갈두〮 (Kàltwú)",
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  ],
  "lang": "Middle Korean",
  "lang_code": "okm",
  "pos": "name",
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      "glosses": [
        "Various peaks in Korea, notably:",
        "A peak in Anju, modern North Korea"
      ],
      "id": "en-갈두-okm-name-uk-Axrf2"
    },
    {
      "categories": [
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        "Various peaks in Korea, notably:",
        "Jeoldu-san, a rocky promontory in Seoul"
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      "links": [
        [
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  ],
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    {
      "ipa": "/kaltu/"
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  "synonyms": [
    {
      "_dis1": "0 0",
      "roman": "the hanja form, all three characters phonogram",
      "word": "加乙頭"
    }
  ],
  "word": "갈두"
}

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  "etymology_templates": [
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      "args": {
        "1": "^갈두"
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      "expansion": "갈두 (Galdu)",
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    },
    {
      "args": {
        "1": "^갈머리"
      },
      "expansion": "갈머리 (Galmeori)",
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      "args": {
        "1": "머리"
      },
      "expansion": "머리 (meori)",
      "name": "ko-l"
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  ],
  "etymology_text": "Probably from 갏 (kalh, “knife”) + Sino-Korean 두(頭) (twu, “head, tip”), in reference to the shape of the peak. There are still about a dozen attested locales called 갈두 (Galdu) in modern Korea, most of which are also called 갈머리 (Galmeori) using the native alternative 머리 (meori) for \"head\".",
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        "A peak in Anju, modern North Korea"
      ]
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        "Jeoldu-san, a rocky promontory in Seoul"
      ],
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          "Seoul"
        ]
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  "word": "갈두"
}