"leesce" meaning in Ancien français

{
  "categories": [
    {
      "kind": "other",
      "name": "Mots en ancien français issus d’un mot en latin",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms communs en ancien français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Ancien français",
      "orig": "ancien français",
      "parents": [],
      "source": "w"
    }
  ],
  "derived": [
    {
      "lang": "Français",
      "lang_code": "fr",
      "word": "liesse"
    }
  ],
  "etymology_texts": [
    "Du latin laetitia."
  ],
  "lang": "Ancien français",
  "lang_code": "fro",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en ancien français",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Exemples en ancien français à traduire",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "La Vie de Saint Alexis, versnᵒ 69, manuscrit 19525 de la BnF, XIIIᵉ siècle",
          "text": "Ceste leesce revert a grant tristor",
          "translation": "Cette joie devient de la tristesse"
        },
        {
          "ref": "Marie de France, Livre de l’espurgatoire, ms. 25407 de la BnF, f. 105r. a.",
          "text": "grant joie, e grant leesce"
        }
      ],
      "glosses": [
        "Joie."
      ],
      "id": "fr-leesce-fro-noun-UsowzhC-"
    }
  ],
  "tags": [
    "feminine"
  ],
  "word": "leesce"
}

{
  "categories": [
    "Mots en ancien français issus d’un mot en latin",
    "Noms communs en ancien français",
    "ancien français"
  ],
  "derived": [
    {
      "lang": "Français",
      "lang_code": "fr",
      "word": "liesse"
    }
  ],
  "etymology_texts": [
    "Du latin laetitia."
  ],
  "lang": "Ancien français",
  "lang_code": "fro",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        "Exemples en ancien français",
        "Exemples en ancien français à traduire"
      ],
      "examples": [
        {
          "ref": "La Vie de Saint Alexis, versnᵒ 69, manuscrit 19525 de la BnF, XIIIᵉ siècle",
          "text": "Ceste leesce revert a grant tristor",
          "translation": "Cette joie devient de la tristesse"
        },
        {
          "ref": "Marie de France, Livre de l’espurgatoire, ms. 25407 de la BnF, f. 105r. a.",
          "text": "grant joie, e grant leesce"
        }
      ],
      "glosses": [
        "Joie."
      ]
    }
  ],
  "tags": [
    "feminine"
  ],
  "word": "leesce"
}