"-i" meaning in Zulu

{
  "etymology_templates": [
    {
      "args": {
        "1": "zu",
        "2": "bnt-pro",
        "3": "*-ì"
      },
      "expansion": "Proto-Bantu *-ì",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Bantu *-ì.",
  "head_templates": [
    {
      "args": {
        "1": "zu",
        "2": "suffix",
        "cat2": "noun-forming suffixes"
      },
      "expansion": "-i",
      "name": "head"
    }
  ],
  "lang": "Zulu",
  "lang_code": "zu",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages using catfix",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 51 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Zulu entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Forms agent nouns from verbs."
      ],
      "id": "en--i-zu-suffix-~UjDcFPU",
      "links": [
        [
          "agent noun",
          "agent noun#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-i"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "zu",
        "2": "bnt-pro",
        "3": "*-ì"
      },
      "expansion": "Proto-Bantu *-ì",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Bantu *-ì.",
  "head_templates": [
    {
      "args": {
        "1": "zu",
        "2": "suffix",
        "cat2": "noun-forming suffixes"
      },
      "expansion": "-i",
      "name": "head"
    }
  ],
  "lang": "Zulu",
  "lang_code": "zu",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Pages using catfix",
        "Pages with 51 entries",
        "Pages with entries",
        "Zulu entries with incorrect language header",
        "Zulu lemmas",
        "Zulu noun-forming suffixes",
        "Zulu suffixes",
        "Zulu terms derived from Proto-Bantu",
        "Zulu terms inherited from Proto-Bantu"
      ],
      "glosses": [
        "Forms agent nouns from verbs."
      ],
      "links": [
        [
          "agent noun",
          "agent noun#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-i"
}