"nejpewniyjszy" meaning in Silesian

{
  "head_templates": [
    {
      "args": {
        "1": "szl",
        "2": "superlative adjective"
      },
      "expansion": "nejpewniyjszy",
      "name": "head"
    }
  ],
  "hyphenation": [
    "nej‧pew‧niyj‧szy"
  ],
  "lang": "Silesian",
  "lang_code": "szl",
  "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": "Silesian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "pewny"
        }
      ],
      "glosses": [
        "superlative degree of pewny"
      ],
      "id": "en-nejpewniyjszy-szl-adj-W4oZt7Hv",
      "links": [
        [
          "pewny",
          "pewny#Silesian"
        ]
      ],
      "tags": [
        "form-of",
        "superlative"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/nɛj.pɛvˈɲɪj.ʂɪ/"
    },
    {
      "rhymes": "-ɪjʂɪ"
    }
  ],
  "word": "nejpewniyjszy"
}

{
  "head_templates": [
    {
      "args": {
        "1": "szl",
        "2": "superlative adjective"
      },
      "expansion": "nejpewniyjszy",
      "name": "head"
    }
  ],
  "hyphenation": [
    "nej‧pew‧niyj‧szy"
  ],
  "lang": "Silesian",
  "lang_code": "szl",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Rhymes:Silesian/ɪjʂɪ",
        "Rhymes:Silesian/ɪjʂɪ/4 syllables",
        "Silesian entries with incorrect language header",
        "Silesian non-lemma forms",
        "Silesian superlative adjectives",
        "Silesian terms with IPA pronunciation"
      ],
      "form_of": [
        {
          "word": "pewny"
        }
      ],
      "glosses": [
        "superlative degree of pewny"
      ],
      "links": [
        [
          "pewny",
          "pewny#Silesian"
        ]
      ],
      "tags": [
        "form-of",
        "superlative"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/nɛj.pɛvˈɲɪj.ʂɪ/"
    },
    {
      "rhymes": "-ɪjʂɪ"
    }
  ],
  "word": "nejpewniyjszy"
}