"-oni" meaning in Garo

{
  "etymology_text": "From -o + -ni.",
  "head_templates": [
    {
      "args": {
        "1": "grt",
        "2": "suffix"
      },
      "expansion": "-oni",
      "name": "head"
    }
  ],
  "lang": "Garo",
  "lang_code": "grt",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Garo entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 4 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "forms the ablative case"
      ],
      "id": "en--oni-grt-suffix-I2XBYXsK",
      "links": [
        [
          "ablative",
          "ablative#English"
        ]
      ],
      "qualifier": "inflectional suffix",
      "raw_glosses": [
        "(inflectional suffix) forms the ablative case"
      ],
      "related": [
        {
          "english": "forms genitive",
          "word": "-ni"
        },
        {
          "english": "forms dative",
          "word": "-na"
        },
        {
          "english": "forms instrumental",
          "word": "-chi"
        },
        {
          "english": "forms locative",
          "word": "-no"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-oni"
}

{
  "etymology_text": "From -o + -ni.",
  "head_templates": [
    {
      "args": {
        "1": "grt",
        "2": "suffix"
      },
      "expansion": "-oni",
      "name": "head"
    }
  ],
  "lang": "Garo",
  "lang_code": "grt",
  "pos": "suffix",
  "related": [
    {
      "english": "forms genitive",
      "word": "-ni"
    },
    {
      "english": "forms dative",
      "word": "-na"
    },
    {
      "english": "forms instrumental",
      "word": "-chi"
    },
    {
      "english": "forms locative",
      "word": "-no"
    }
  ],
  "senses": [
    {
      "categories": [
        "Garo entries with incorrect language header",
        "Garo lemmas",
        "Garo suffixes",
        "Pages with 4 entries",
        "Pages with entries"
      ],
      "glosses": [
        "forms the ablative case"
      ],
      "links": [
        [
          "ablative",
          "ablative#English"
        ]
      ],
      "qualifier": "inflectional suffix",
      "raw_glosses": [
        "(inflectional suffix) forms the ablative case"
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-oni"
}