"nd- -i" meaning in Guaraní

{
  "forms": [
    {
      "form": "n- -i",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "nd- -ri",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "n- -ri",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "gn",
        "2": "circumfix"
      },
      "expansion": "nd- -i",
      "name": "head"
    }
  ],
  "lang": "Guaraní",
  "lang_code": "gn",
  "pos": "circumfix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Guaraní circumfixes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Guaraní entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Guaraní links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "ojapo (“he makes”) → ndojapói (“he does not make”)",
          "type": "example"
        }
      ],
      "glosses": [
        "not; appended to a verb to negate it."
      ],
      "id": "en-nd-_-i-gn-circumfix-eAsoWxj-",
      "links": [
        [
          "not",
          "not"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "nd- -i"
}

{
  "forms": [
    {
      "form": "n- -i",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "nd- -ri",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "n- -ri",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "gn",
        "2": "circumfix"
      },
      "expansion": "nd- -i",
      "name": "head"
    }
  ],
  "lang": "Guaraní",
  "lang_code": "gn",
  "pos": "circumfix",
  "senses": [
    {
      "categories": [
        "Guaraní circumfixes",
        "Guaraní entries with incorrect language header",
        "Guaraní lemmas",
        "Guaraní links with redundant wikilinks",
        "Guaraní multiword terms",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "text": "ojapo (“he makes”) → ndojapói (“he does not make”)",
          "type": "example"
        }
      ],
      "glosses": [
        "not; appended to a verb to negate it."
      ],
      "links": [
        [
          "not",
          "not"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "nd- -i"
}