"není" meaning in Czech

{
  "etymology_templates": [
    {
      "args": {
        "1": "cs",
        "2": "zlw-ocs",
        "3": "nenie"
      },
      "expansion": "Old Czech nenie",
      "name": "inh"
    },
    {
      "args": {
        "1": "zlw-ocs",
        "2": "",
        "3": "*nie"
      },
      "expansion": "*nie",
      "name": "m"
    },
    {
      "args": {
        "1": "cs",
        "2": "ne-",
        "3": "je"
      },
      "expansion": "ne- + je",
      "name": "af"
    }
  ],
  "etymology_text": "From Old Czech nenie, from a supposed earlier *nie, itself a contraction of ne- + je, by adding another negative prefix to make the negative more distinct.",
  "head_templates": [
    {
      "args": {
        "1": "cs",
        "2": "verb form"
      },
      "expansion": "není",
      "name": "head"
    }
  ],
  "lang": "Czech",
  "lang_code": "cs",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Czech entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Czech terms prefixed with ne-",
          "parents": [],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "nebýt"
        }
      ],
      "glosses": [
        "third-person singular present indicative of nebýt"
      ],
      "id": "en-není-cs-verb-pTuCpFzD",
      "links": [
        [
          "nebýt",
          "nebýt#Czech"
        ]
      ],
      "tags": [
        "form-of",
        "indicative",
        "present",
        "singular",
        "third-person"
      ],
      "wikipedia": [
        "cs:Český etymologický slovník"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈnɛɲiː]"
    }
  ],
  "word": "není"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "cs",
        "2": "zlw-ocs",
        "3": "nenie"
      },
      "expansion": "Old Czech nenie",
      "name": "inh"
    },
    {
      "args": {
        "1": "zlw-ocs",
        "2": "",
        "3": "*nie"
      },
      "expansion": "*nie",
      "name": "m"
    },
    {
      "args": {
        "1": "cs",
        "2": "ne-",
        "3": "je"
      },
      "expansion": "ne- + je",
      "name": "af"
    }
  ],
  "etymology_text": "From Old Czech nenie, from a supposed earlier *nie, itself a contraction of ne- + je, by adding another negative prefix to make the negative more distinct.",
  "head_templates": [
    {
      "args": {
        "1": "cs",
        "2": "verb form"
      },
      "expansion": "není",
      "name": "head"
    }
  ],
  "lang": "Czech",
  "lang_code": "cs",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "Czech entries with incorrect language header",
        "Czech non-lemma forms",
        "Czech terms derived from Old Czech",
        "Czech terms inherited from Old Czech",
        "Czech terms prefixed with ne-",
        "Czech terms with IPA pronunciation",
        "Czech verb forms"
      ],
      "form_of": [
        {
          "word": "nebýt"
        }
      ],
      "glosses": [
        "third-person singular present indicative of nebýt"
      ],
      "links": [
        [
          "nebýt",
          "nebýt#Czech"
        ]
      ],
      "tags": [
        "form-of",
        "indicative",
        "present",
        "singular",
        "third-person"
      ],
      "wikipedia": [
        "cs:Český etymologický slovník"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈnɛɲiː]"
    }
  ],
  "word": "není"
}