"čierna" meaning in Slovak

{
  "head_templates": [
    {
      "args": {
        "1": "sk",
        "2": "adjective form"
      },
      "expansion": "čierna",
      "name": "head"
    }
  ],
  "lang": "Slovak",
  "lang_code": "sk",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Slovak entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "čierny"
        }
      ],
      "glosses": [
        "feminine nominative singular of čierny"
      ],
      "id": "en-čierna-sk-adj-XyLnKZnH",
      "links": [
        [
          "čierny",
          "čierny#Slovak"
        ]
      ],
      "tags": [
        "feminine",
        "form-of",
        "nominative",
        "singular"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈt͡ʃi̯erna]"
    }
  ],
  "word": "čierna"
}

{
  "head_templates": [
    {
      "args": {
        "1": "sk",
        "2": "adjective form"
      },
      "expansion": "čierna",
      "name": "head"
    }
  ],
  "lang": "Slovak",
  "lang_code": "sk",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "Slovak adjective forms",
        "Slovak entries with incorrect language header",
        "Slovak non-lemma forms",
        "Slovak terms with IPA pronunciation"
      ],
      "form_of": [
        {
          "word": "čierny"
        }
      ],
      "glosses": [
        "feminine nominative singular of čierny"
      ],
      "links": [
        [
          "čierny",
          "čierny#Slovak"
        ]
      ],
      "tags": [
        "feminine",
        "form-of",
        "nominative",
        "singular"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈt͡ʃi̯erna]"
    }
  ],
  "word": "čierna"
}