"faillir" meaning in Middle French

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "fr",
            "2": "faillir"
          },
          "expansion": "French: faillir\n→ German: fallieren\n→ Swedish: fallera",
          "name": "desctree"
        }
      ],
      "text": "French: faillir\n→ German: fallieren\n→ Swedish: fallera"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "frm",
        "2": "fro",
        "3": "falir"
      },
      "expansion": "Old French falir",
      "name": "inh"
    },
    {
      "args": {
        "1": "frm",
        "2": "VL.",
        "3": "*fallīre"
      },
      "expansion": "Vulgar Latin *fallīre",
      "name": "inh"
    },
    {
      "args": {
        "1": "frm",
        "2": "la",
        "3": "fallere"
      },
      "expansion": "Latin fallere",
      "name": "inh"
    },
    {
      "args": {
        "1": "la",
        "2": "fallō"
      },
      "expansion": "fallō",
      "name": "m"
    }
  ],
  "etymology_text": "From Old French falir, from Vulgar Latin *fallīre, from Latin fallere, present active infinitive of fallō.",
  "head_templates": [
    {
      "args": {
        "1": "frm",
        "2": "verb"
      },
      "expansion": "faillir",
      "name": "head"
    }
  ],
  "lang": "Middle French",
  "lang_code": "frm",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Middle French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "when their lances failed them, they took up their axes",
          "ref": "c. 1369, Jean Froissart, Chroniques",
          "text": "quant les lances leur failloient, ils se prendoient aux haches",
          "type": "quotation"
        },
        {
          "english": "Or, if they preferred, they still made use of this deterioration, and did their affairs by this other means which could never fail them",
          "ref": "1595, Michel de Montaigne, Essais, book II, chapter 37",
          "text": "Ou, s’il leur plait, ils se servent encore de cet empirement, et en font leurs affaires par cet autre moyen qui ne leur peut jamais faillir",
          "type": "quotation"
        }
      ],
      "glosses": [
        "to fail"
      ],
      "id": "en-faillir-frm-verb-nv~ZTwV1",
      "links": [
        [
          "fail",
          "fail"
        ]
      ]
    }
  ],
  "word": "faillir"
}

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "fr",
            "2": "faillir"
          },
          "expansion": "French: faillir\n→ German: fallieren\n→ Swedish: fallera",
          "name": "desctree"
        }
      ],
      "text": "French: faillir\n→ German: fallieren\n→ Swedish: fallera"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "frm",
        "2": "fro",
        "3": "falir"
      },
      "expansion": "Old French falir",
      "name": "inh"
    },
    {
      "args": {
        "1": "frm",
        "2": "VL.",
        "3": "*fallīre"
      },
      "expansion": "Vulgar Latin *fallīre",
      "name": "inh"
    },
    {
      "args": {
        "1": "frm",
        "2": "la",
        "3": "fallere"
      },
      "expansion": "Latin fallere",
      "name": "inh"
    },
    {
      "args": {
        "1": "la",
        "2": "fallō"
      },
      "expansion": "fallō",
      "name": "m"
    }
  ],
  "etymology_text": "From Old French falir, from Vulgar Latin *fallīre, from Latin fallere, present active infinitive of fallō.",
  "head_templates": [
    {
      "args": {
        "1": "frm",
        "2": "verb"
      },
      "expansion": "faillir",
      "name": "head"
    }
  ],
  "lang": "Middle French",
  "lang_code": "frm",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "Middle French entries with incorrect language header",
        "Middle French lemmas",
        "Middle French terms derived from Latin",
        "Middle French terms derived from Old French",
        "Middle French terms derived from Vulgar Latin",
        "Middle French terms inherited from Latin",
        "Middle French terms inherited from Old French",
        "Middle French terms inherited from Vulgar Latin",
        "Middle French terms with quotations",
        "Middle French verbs"
      ],
      "examples": [
        {
          "english": "when their lances failed them, they took up their axes",
          "ref": "c. 1369, Jean Froissart, Chroniques",
          "text": "quant les lances leur failloient, ils se prendoient aux haches",
          "type": "quotation"
        },
        {
          "english": "Or, if they preferred, they still made use of this deterioration, and did their affairs by this other means which could never fail them",
          "ref": "1595, Michel de Montaigne, Essais, book II, chapter 37",
          "text": "Ou, s’il leur plait, ils se servent encore de cet empirement, et en font leurs affaires par cet autre moyen qui ne leur peut jamais faillir",
          "type": "quotation"
        }
      ],
      "glosses": [
        "to fail"
      ],
      "links": [
        [
          "fail",
          "fail"
        ]
      ]
    }
  ],
  "word": "faillir"
}