"unnasty" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "un",
        "3": "nasty"
      },
      "expansion": "un- + nasty",
      "name": "prefix"
    }
  ],
  "etymology_text": "un- + nasty",
  "forms": [
    {
      "form": "more unnasty",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most unnasty",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "unnasty (comparative more unnasty, superlative most unnasty)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with un-",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Not nasty; pleasant."
      ],
      "id": "en-unnasty-en-adj-U80ddVu6",
      "links": [
        [
          "nasty",
          "nasty"
        ],
        [
          "pleasant",
          "pleasant"
        ]
      ],
      "raw_glosses": [
        "(rare) Not nasty; pleasant."
      ],
      "tags": [
        "rare"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-æsti"
    }
  ],
  "word": "unnasty"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "un",
        "3": "nasty"
      },
      "expansion": "un- + nasty",
      "name": "prefix"
    }
  ],
  "etymology_text": "un- + nasty",
  "forms": [
    {
      "form": "more unnasty",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most unnasty",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "unnasty (comparative more unnasty, superlative most unnasty)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms prefixed with un-",
        "English terms with rare senses",
        "Rhymes:English/æsti",
        "Rhymes:English/æsti/3 syllables"
      ],
      "glosses": [
        "Not nasty; pleasant."
      ],
      "links": [
        [
          "nasty",
          "nasty"
        ],
        [
          "pleasant",
          "pleasant"
        ]
      ],
      "raw_glosses": [
        "(rare) Not nasty; pleasant."
      ],
      "tags": [
        "rare"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-æsti"
    }
  ],
  "word": "unnasty"
}