"두음 법칙" meaning in Korean

{
  "etymology_templates": [
    {
      "args": {
        "1": "頭音",
        "2": "initial sound",
        "3": "法則",
        "4": "law"
      },
      "expansion": "Sino-Korean word from 頭音法則, from 頭音 (“initial sound”) + 法則 (“law”)",
      "name": "ko-etym-sino"
    }
  ],
  "etymology_text": "Sino-Korean word from 頭音法則, from 頭音 (“initial sound”) + 法則 (“law”)",
  "forms": [
    {
      "form": "dueum beopchik",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "頭音法則",
      "tags": [
        "hanja"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "hanja": "頭音法則"
      },
      "expansion": "두음 법칙 • (dueum beopchik) (hanja 頭音法則)",
      "name": "ko-noun"
    }
  ],
  "lang": "Korean",
  "lang_code": "ko",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Korean entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Korean terms with redundant script codes",
          "parents": [
            "Terms with redundant script codes",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Korean terms with redundant transliterations",
          "parents": [
            "Terms with redundant transliterations",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Sino-Korean words",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "South Korean",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "ko",
          "name": "Linguistics",
          "orig": "ko:Linguistics",
          "parents": [
            "Language",
            "Social sciences",
            "Communication",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "the \"initial law\" (a rule that alters the spelling of Sino-Korean words that begin with the consonant ㄹ (l) and ㄴ (n))"
      ],
      "id": "en-두음_법칙-ko-noun-cGtpslEw",
      "links": [
        [
          "linguistics",
          "linguistics"
        ],
        [
          "initial",
          "initial#Noun"
        ],
        [
          "law",
          "law"
        ],
        [
          "rule",
          "rule#English"
        ],
        [
          "Sino-Korean",
          "Sino-Korean#English"
        ],
        [
          "ㄹ",
          "ㄹ#Korean"
        ],
        [
          "ㄴ",
          "ㄴ#Korean"
        ]
      ],
      "raw_glosses": [
        "(linguistics, South Korea) the \"initial law\" (a rule that alters the spelling of Sino-Korean words that begin with the consonant ㄹ (l) and ㄴ (n))"
      ],
      "tags": [
        "South-Korea"
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences"
      ],
      "wikipedia": [
        "ko:두음 법칙"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[tuɯm pʌ̹p̚t͡ɕʰik̚]",
      "tags": [
        "SK-Standard",
        "Seoul"
      ]
    },
    {
      "other": "[두음법칙]"
    }
  ],
  "word": "두음 법칙"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "頭音",
        "2": "initial sound",
        "3": "法則",
        "4": "law"
      },
      "expansion": "Sino-Korean word from 頭音法則, from 頭音 (“initial sound”) + 法則 (“law”)",
      "name": "ko-etym-sino"
    }
  ],
  "etymology_text": "Sino-Korean word from 頭音法則, from 頭音 (“initial sound”) + 法則 (“law”)",
  "forms": [
    {
      "form": "dueum beopchik",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "頭音法則",
      "tags": [
        "hanja"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "hanja": "頭音法則"
      },
      "expansion": "두음 법칙 • (dueum beopchik) (hanja 頭音法則)",
      "name": "ko-noun"
    }
  ],
  "lang": "Korean",
  "lang_code": "ko",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Korean entries with incorrect language header",
        "Korean lemmas",
        "Korean multiword terms",
        "Korean nouns",
        "Korean terms with IPA pronunciation",
        "Korean terms with redundant script codes",
        "Korean terms with redundant transliterations",
        "Sino-Korean words",
        "South Korean",
        "ko:Linguistics"
      ],
      "glosses": [
        "the \"initial law\" (a rule that alters the spelling of Sino-Korean words that begin with the consonant ㄹ (l) and ㄴ (n))"
      ],
      "links": [
        [
          "linguistics",
          "linguistics"
        ],
        [
          "initial",
          "initial#Noun"
        ],
        [
          "law",
          "law"
        ],
        [
          "rule",
          "rule#English"
        ],
        [
          "Sino-Korean",
          "Sino-Korean#English"
        ],
        [
          "ㄹ",
          "ㄹ#Korean"
        ],
        [
          "ㄴ",
          "ㄴ#Korean"
        ]
      ],
      "raw_glosses": [
        "(linguistics, South Korea) the \"initial law\" (a rule that alters the spelling of Sino-Korean words that begin with the consonant ㄹ (l) and ㄴ (n))"
      ],
      "tags": [
        "South-Korea"
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences"
      ],
      "wikipedia": [
        "ko:두음 법칙"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[tuɯm pʌ̹p̚t͡ɕʰik̚]",
      "tags": [
        "SK-Standard",
        "Seoul"
      ]
    },
    {
      "other": "[두음법칙]"
    }
  ],
  "word": "두음 법칙"
}