"-er" meaning in Walloon

{
  "head_templates": [
    {
      "args": {
        "1": "wa",
        "2": "suffix"
      },
      "expansion": "-er",
      "name": "head"
    }
  ],
  "lang": "Walloon",
  "lang_code": "wa",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with raw sortkeys",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Walloon entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A verb ending for infinitives."
      ],
      "id": "en--er-wa-suffix-~QjNW-Ox",
      "links": [
        [
          "infinitives",
          "infinitives#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/e/"
    }
  ],
  "word": "-er"
}

{
  "categories": [
    "Pages with raw sortkeys"
  ],
  "head_templates": [
    {
      "args": {
        "1": "wa",
        "2": "suffix"
      },
      "expansion": "-er",
      "name": "head"
    }
  ],
  "lang": "Walloon",
  "lang_code": "wa",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Pages with raw sortkeys",
        "Walloon entries with incorrect language header",
        "Walloon lemmas",
        "Walloon suffixes",
        "Walloon terms with IPA pronunciation"
      ],
      "glosses": [
        "A verb ending for infinitives."
      ],
      "links": [
        [
          "infinitives",
          "infinitives#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/e/"
    }
  ],
  "word": "-er"
}