"vastaiseen" meaning in Finnish

{
  "head_templates": [
    {
      "args": {
        "1": "fi",
        "2": "adjective form"
      },
      "expansion": "vastaiseen",
      "name": "head"
    }
  ],
  "lang": "Finnish",
  "lang_code": "fi",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Finnish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "vastainen"
        }
      ],
      "glosses": [
        "illative singular of vastainen"
      ],
      "id": "en-vastaiseen-fi-adj-XLwViZPN",
      "links": [
        [
          "vastainen",
          "vastainen#Finnish"
        ]
      ],
      "tags": [
        "form-of",
        "illative",
        "singular"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈʋɑstɑi̯seːn/"
    },
    {
      "ipa": "[ˈʋɑ̝s̠tɑ̝i̯s̠e̞ːn]"
    },
    {
      "rhymes": "-ɑstɑiseːn"
    }
  ],
  "word": "vastaiseen"
}

{
  "head_templates": [
    {
      "args": {
        "1": "fi",
        "2": "adjective form"
      },
      "expansion": "vastaiseen",
      "name": "head"
    }
  ],
  "lang": "Finnish",
  "lang_code": "fi",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "Finnish 3-syllable words",
        "Finnish adjective forms",
        "Finnish entries with incorrect language header",
        "Finnish non-lemma forms",
        "Finnish terms with IPA pronunciation",
        "Rhymes:Finnish/ɑstɑiseːn",
        "Rhymes:Finnish/ɑstɑiseːn/3 syllables"
      ],
      "form_of": [
        {
          "word": "vastainen"
        }
      ],
      "glosses": [
        "illative singular of vastainen"
      ],
      "links": [
        [
          "vastainen",
          "vastainen#Finnish"
        ]
      ],
      "tags": [
        "form-of",
        "illative",
        "singular"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈʋɑstɑi̯seːn/"
    },
    {
      "ipa": "[ˈʋɑ̝s̠tɑ̝i̯s̠e̞ːn]"
    },
    {
      "rhymes": "-ɑstɑiseːn"
    }
  ],
  "word": "vastaiseen"
}