"dữ dằn" meaning in Vietnamese

{
  "etymology_templates": [
    {
      "args": {
        "1": "vi",
        "2": "dữ",
        "3": "dằn"
      },
      "expansion": "dữ + dằn",
      "name": "com"
    },
    {
      "args": {
        "1": "vi",
        "2": "zh",
        "3": "寅//",
        "pos": "SV: <i class=\"Latn mention\" lang=\"vi\">dần</i>",
        "t": "3rd Earth Branch; tiger in Chinese zodiac",
        "tr": "-"
      },
      "expansion": "Chinese 寅 (“3rd Earth Branch; tiger in Chinese zodiac”, SV: dần)",
      "name": "der"
    },
    {
      "args": {
        "1": "寅",
        "2": "3rd Earth Branch; tiger in Chinese zodiac",
        "3": "dần",
        "hv": "n",
        "nocap": "y"
      },
      "expansion": "non-Sino-Vietnamese reading of Chinese 寅 (“3rd Earth Branch; tiger in Chinese zodiac”, SV: dần)",
      "name": "vi-etym-sino"
    }
  ],
  "etymology_text": "dữ + dằn. \"dằn\" is possibly a fossil and derives from a non-Sino-Vietnamese reading of Chinese 寅 (“3rd Earth Branch; tiger in Chinese zodiac”, SV: dần); if so, dữ dằn would have originally meant \"fierce, ferocious as a tiger\".",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "adjective",
        "3": "",
        "4": "",
        "5": "",
        "6": "",
        "7": "",
        "8": "",
        "head": "",
        "tr": ""
      },
      "expansion": "dữ dằn",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "dữ dằn",
      "name": "vi-adj"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Vietnamese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "fierce, ferocious"
      ],
      "id": "en-dữ_dằn-vi-adj-EANd~pqi",
      "links": [
        [
          "fierce",
          "fierce"
        ],
        [
          "ferocious",
          "ferocious"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[zɨ˦ˀ˥ zan˨˩]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[jɨ˧˨ jaŋ˦˩]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[jɨ˨˩˦ jaŋ˨˩]",
      "note": "Saigon"
    }
  ],
  "word": "dữ dằn"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "vi",
        "2": "dữ",
        "3": "dằn"
      },
      "expansion": "dữ + dằn",
      "name": "com"
    },
    {
      "args": {
        "1": "vi",
        "2": "zh",
        "3": "寅//",
        "pos": "SV: <i class=\"Latn mention\" lang=\"vi\">dần</i>",
        "t": "3rd Earth Branch; tiger in Chinese zodiac",
        "tr": "-"
      },
      "expansion": "Chinese 寅 (“3rd Earth Branch; tiger in Chinese zodiac”, SV: dần)",
      "name": "der"
    },
    {
      "args": {
        "1": "寅",
        "2": "3rd Earth Branch; tiger in Chinese zodiac",
        "3": "dần",
        "hv": "n",
        "nocap": "y"
      },
      "expansion": "non-Sino-Vietnamese reading of Chinese 寅 (“3rd Earth Branch; tiger in Chinese zodiac”, SV: dần)",
      "name": "vi-etym-sino"
    }
  ],
  "etymology_text": "dữ + dằn. \"dằn\" is possibly a fossil and derives from a non-Sino-Vietnamese reading of Chinese 寅 (“3rd Earth Branch; tiger in Chinese zodiac”, SV: dần); if so, dữ dằn would have originally meant \"fierce, ferocious as a tiger\".",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "adjective",
        "3": "",
        "4": "",
        "5": "",
        "6": "",
        "7": "",
        "8": "",
        "head": "",
        "tr": ""
      },
      "expansion": "dữ dằn",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "dữ dằn",
      "name": "vi-adj"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Vietnamese adjectives",
        "Vietnamese compound terms",
        "Vietnamese entries with incorrect language header",
        "Vietnamese lemmas",
        "Vietnamese terms derived from Chinese",
        "Vietnamese terms with IPA pronunciation"
      ],
      "glosses": [
        "fierce, ferocious"
      ],
      "links": [
        [
          "fierce",
          "fierce"
        ],
        [
          "ferocious",
          "ferocious"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[zɨ˦ˀ˥ zan˨˩]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[jɨ˧˨ jaŋ˦˩]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[jɨ˨˩˦ jaŋ˨˩]",
      "note": "Saigon"
    }
  ],
  "word": "dữ dằn"
}