"-bourg" meaning in French

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "frk",
        "3": "*burg"
      },
      "expansion": "Frankish *burg",
      "name": "der"
    }
  ],
  "etymology_text": "Borrowed from Frankish *burg.",
  "forms": [
    {
      "form": "-bourgs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "-bourg m (plural -bourgs)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "forms placenames"
      ],
      "id": "en--bourg-fr-suffix-zDBxXehp",
      "tags": [
        "masculine",
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/buʁ/"
    }
  ],
  "word": "-bourg"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "frk",
        "3": "*burg"
      },
      "expansion": "Frankish *burg",
      "name": "der"
    }
  ],
  "etymology_text": "Borrowed from Frankish *burg.",
  "forms": [
    {
      "form": "-bourgs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "-bourg m (plural -bourgs)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "French 1-syllable words",
        "French countable nouns",
        "French entries with incorrect language header",
        "French lemmas",
        "French masculine suffixes",
        "French noun-forming suffixes",
        "French nouns with red links in their headword lines",
        "French suffixes",
        "French terms derived from Frankish",
        "French terms with IPA pronunciation",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "forms placenames"
      ],
      "tags": [
        "masculine",
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/buʁ/"
    }
  ],
  "word": "-bourg"
}