"정녕" meaning in Korean

{
  "etymology_templates": [
    {
      "args": {
        "1": "叮嚀"
      },
      "expansion": "Sino-Korean word from 叮嚀",
      "name": "ko-etym-sino"
    }
  ],
  "etymology_text": "Sino-Korean word from 叮嚀.",
  "forms": [
    {
      "form": "jeongnyeong",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "叮嚀",
      "tags": [
        "hanja"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "hanja": "叮嚀"
      },
      "expansion": "정녕 • (jeongnyeong) (hanja 叮嚀)",
      "name": "ko-adv"
    }
  ],
  "lang": "Korean",
  "lang_code": "ko",
  "pos": "adv",
  "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"
        }
      ],
      "examples": [
        {
          "english": "What truly is love?",
          "roman": "sarang-eun jeongnyeong mueos-in'ga?",
          "text": "사랑은 정녕 무엇인가?",
          "type": "example"
        },
        {
          "english": "I thought that I had gone definitively insane.",
          "roman": "jeongnyeong nae-ga micheotguna saenggakhaetda.",
          "text": "정녕 내가 미쳤구나 생각했다.",
          "type": "example"
        }
      ],
      "glosses": [
        "certainly, definitively, really, for sure"
      ],
      "id": "en-정녕-ko-adv-9CoylI7A",
      "links": [
        [
          "certain",
          "certain"
        ],
        [
          "definitive",
          "definitive"
        ],
        [
          "really",
          "really"
        ],
        [
          "for sure",
          "for sure"
        ]
      ],
      "synonyms": [
        {
          "word": "참으로"
        },
        {
          "word": "정말로"
        },
        {
          "word": "진짜"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[t͡ɕʌ̹ŋɲʌ̹ŋ]",
      "tags": [
        "SK-Standard",
        "Seoul"
      ]
    },
    {
      "other": "[정녕]"
    }
  ],
  "word": "정녕"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "叮嚀"
      },
      "expansion": "Sino-Korean word from 叮嚀",
      "name": "ko-etym-sino"
    }
  ],
  "etymology_text": "Sino-Korean word from 叮嚀.",
  "forms": [
    {
      "form": "jeongnyeong",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "叮嚀",
      "tags": [
        "hanja"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "hanja": "叮嚀"
      },
      "expansion": "정녕 • (jeongnyeong) (hanja 叮嚀)",
      "name": "ko-adv"
    }
  ],
  "lang": "Korean",
  "lang_code": "ko",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "Korean adverbs",
        "Korean entries with incorrect language header",
        "Korean lemmas",
        "Korean terms with IPA pronunciation",
        "Korean terms with redundant script codes",
        "Korean terms with redundant transliterations",
        "Korean terms with usage examples",
        "Sino-Korean words"
      ],
      "examples": [
        {
          "english": "What truly is love?",
          "roman": "sarang-eun jeongnyeong mueos-in'ga?",
          "text": "사랑은 정녕 무엇인가?",
          "type": "example"
        },
        {
          "english": "I thought that I had gone definitively insane.",
          "roman": "jeongnyeong nae-ga micheotguna saenggakhaetda.",
          "text": "정녕 내가 미쳤구나 생각했다.",
          "type": "example"
        }
      ],
      "glosses": [
        "certainly, definitively, really, for sure"
      ],
      "links": [
        [
          "certain",
          "certain"
        ],
        [
          "definitive",
          "definitive"
        ],
        [
          "really",
          "really"
        ],
        [
          "for sure",
          "for sure"
        ]
      ],
      "synonyms": [
        {
          "word": "참으로"
        },
        {
          "word": "정말로"
        },
        {
          "word": "진짜"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[t͡ɕʌ̹ŋɲʌ̹ŋ]",
      "tags": [
        "SK-Standard",
        "Seoul"
      ]
    },
    {
      "other": "[정녕]"
    }
  ],
  "word": "정녕"
}