"-wa" meaning in Swazi

{
  "etymology_templates": [
    {
      "args": {
        "1": "ss",
        "2": "bnt-pro",
        "3": "*-úa"
      },
      "expansion": "Proto-Bantu *-úa",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Bantu *-úa.",
  "head_templates": [
    {
      "args": {
        "1": "ss",
        "2": "suffix",
        "cat2": "verb-forming suffixes"
      },
      "expansion": "-wa",
      "name": "head"
    }
  ],
  "lang": "Swazi",
  "lang_code": "ss",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages using catfix",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 11 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Swazi entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Forms passive verbs."
      ],
      "id": "en--wa-ss-suffix-jsvjUmlH",
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-wa"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "ss",
        "2": "bnt-pro",
        "3": "*-úa"
      },
      "expansion": "Proto-Bantu *-úa",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Bantu *-úa.",
  "head_templates": [
    {
      "args": {
        "1": "ss",
        "2": "suffix",
        "cat2": "verb-forming suffixes"
      },
      "expansion": "-wa",
      "name": "head"
    }
  ],
  "lang": "Swazi",
  "lang_code": "ss",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Pages using catfix",
        "Pages with 11 entries",
        "Pages with entries",
        "Swazi entries with incorrect language header",
        "Swazi lemmas",
        "Swazi suffixes",
        "Swazi terms derived from Proto-Bantu",
        "Swazi terms inherited from Proto-Bantu",
        "Swazi verb-forming suffixes"
      ],
      "glosses": [
        "Forms passive verbs."
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-wa"
}