"pourpié" meaning in Moyen français

{
  "categories": [
    {
      "kind": "other",
      "name": "Noms communs en moyen français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Moyen français",
      "orig": "moyen français",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Moyen français",
  "lang_code": "frm",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en moyen français",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Exemples en moyen français à traduire",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              0,
              7
            ]
          ],
          "ref": "Olivier De La Haye, Poeme Sur La Grande Peste de 1348",
          "text": "pourpié, une herbe vive"
        }
      ],
      "glosses": [
        "Pourpier."
      ],
      "id": "fr-pourpié-frm-noun-5bzq0pcS"
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "pourpié"
}

{
  "categories": [
    "Noms communs en moyen français",
    "moyen français"
  ],
  "lang": "Moyen français",
  "lang_code": "frm",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        "Exemples en moyen français",
        "Exemples en moyen français à traduire"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              0,
              7
            ]
          ],
          "ref": "Olivier De La Haye, Poeme Sur La Grande Peste de 1348",
          "text": "pourpié, une herbe vive"
        }
      ],
      "glosses": [
        "Pourpier."
      ]
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "pourpié"
}