"-siin" meaning in Finnish

{
  "etymology_templates": [
    {
      "args": {
        "1": "fi",
        "2": "-hin"
      },
      "expansion": "-hin",
      "name": "m"
    },
    {
      "args": {
        "1": "fi",
        "2": "-Vn",
        "3": "-in",
        "id": "illative"
      },
      "expansion": "-in",
      "name": "m"
    },
    {
      "args": {
        "1": "fi",
        "2": "-seen"
      },
      "expansion": "-seen",
      "name": "m"
    }
  ],
  "etymology_text": "By analogy from -hin, -in, the other plural illative suffix (as the plural infix -i- affects the vowel used by the illative suffix, even when this would not happen for -seen).",
  "head_templates": [
    {
      "args": {
        "1": "fi",
        "2": "suffix",
        "cat2": "case suffixes"
      },
      "expansion": "-siin",
      "name": "head"
    }
  ],
  "lang": "Finnish",
  "lang_code": "fi",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Finnish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        },
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          "kind": "other",
          "name": "Finnish entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
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          "source": "w"
        },
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          "kind": "other",
          "name": "Finnish terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with raw sortkeys",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "52 34 14",
          "kind": "other",
          "name": "Pages with raw sortkeys",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "english": "into the chocolate",
          "text": "suklaaseen",
          "type": "example"
        },
        {
          "english": "into the chocolates",
          "text": "suklaisiin",
          "type": "example"
        }
      ],
      "form_of": [
        {
          "word": "the illative suffix -seen"
        }
      ],
      "glosses": [
        "plural form of the illative suffix -seen"
      ],
      "id": "en--siin-fi-suffix-tCNoDnVk",
      "links": [
        [
          "-seen",
          "-seen#Finnish"
        ]
      ],
      "tags": [
        "form-of",
        "morpheme",
        "plural"
      ]
    }
  ],
  "word": "-siin"
}

{
  "categories": [
    "Pages with raw sortkeys"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "fi",
        "2": "-hin"
      },
      "expansion": "-hin",
      "name": "m"
    },
    {
      "args": {
        "1": "fi",
        "2": "-Vn",
        "3": "-in",
        "id": "illative"
      },
      "expansion": "-in",
      "name": "m"
    },
    {
      "args": {
        "1": "fi",
        "2": "-seen"
      },
      "expansion": "-seen",
      "name": "m"
    }
  ],
  "etymology_text": "By analogy from -hin, -in, the other plural illative suffix (as the plural infix -i- affects the vowel used by the illative suffix, even when this would not happen for -seen).",
  "head_templates": [
    {
      "args": {
        "1": "fi",
        "2": "suffix",
        "cat2": "case suffixes"
      },
      "expansion": "-siin",
      "name": "head"
    }
  ],
  "lang": "Finnish",
  "lang_code": "fi",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Finnish case suffixes",
        "Finnish entries with incorrect language header",
        "Finnish entries with language name categories using raw markup",
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        "Finnish suffix forms",
        "Finnish suffixes",
        "Finnish terms with redundant sortkeys",
        "Finnish terms with usage examples",
        "Pages with raw sortkeys"
      ],
      "examples": [
        {
          "english": "into the chocolate",
          "text": "suklaaseen",
          "type": "example"
        },
        {
          "english": "into the chocolates",
          "text": "suklaisiin",
          "type": "example"
        }
      ],
      "form_of": [
        {
          "word": "the illative suffix -seen"
        }
      ],
      "glosses": [
        "plural form of the illative suffix -seen"
      ],
      "links": [
        [
          "-seen",
          "-seen#Finnish"
        ]
      ],
      "tags": [
        "form-of",
        "morpheme",
        "plural"
      ]
    }
  ],
  "word": "-siin"
}