"foil" meaning in Old French

{
  "etymology_templates": [
    {
      "args": {
        "1": "fro",
        "2": "la",
        "3": "folium"
      },
      "expansion": "Latin folium",
      "name": "der"
    }
  ],
  "etymology_text": "From Latin folium. Compare fueille, from the plural of folium, folia.",
  "forms": [
    {
      "form": "foil oblique singular or",
      "tags": [
        "canonical",
        "masculine"
      ]
    },
    {
      "form": "fouz",
      "tags": [
        "oblique",
        "plural"
      ]
    },
    {
      "form": "foilz",
      "tags": [
        "oblique",
        "plural"
      ]
    },
    {
      "form": "fouz",
      "tags": [
        "nominative",
        "singular"
      ]
    },
    {
      "form": "foilz",
      "tags": [
        "nominative",
        "singular"
      ]
    },
    {
      "form": "foil",
      "tags": [
        "nominative",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "foil oblique singular, m (oblique plural fouz or foilz, nominative singular fouz or foilz, nominative plural foil)",
      "name": "fro-noun"
    }
  ],
  "lang": "Old French",
  "lang_code": "fro",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Old French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 3 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "0 5 7 3 9 4 1 10 4 3 4 2 5 5 2 1 2 1 3 1 1 6 1 16 2 0",
          "kind": "other",
          "name": "Pages with 3 entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "0 6 9 3 11 3 1 12 3 3 5 1 5 3 2 1 1 1 4 1 1 5 1 14 1 0",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "leaf (green appendage of a plant which photosynthesizes)"
      ],
      "id": "en-foil-fro-noun-uTL1fKdF",
      "links": [
        [
          "leaf",
          "leaf"
        ]
      ],
      "synonyms": [
        {
          "word": "feul"
        },
        {
          "word": "foel"
        },
        {
          "word": "fol"
        },
        {
          "word": "fueill"
        },
        {
          "word": "fuel"
        },
        {
          "word": "fuil"
        }
      ]
    }
  ],
  "word": "foil"
}

{
  "categories": [
    "Old Irish entries with incorrect language header",
    "Old Irish feminine nouns",
    "Old Irish g-stem nouns",
    "Old Irish lemmas",
    "Old Irish nouns",
    "Old Irish terms derived from Proto-Celtic",
    "Old Irish terms inherited from Proto-Celtic",
    "Pages with 3 entries",
    "Pages with entries"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "fro",
        "2": "la",
        "3": "folium"
      },
      "expansion": "Latin folium",
      "name": "der"
    }
  ],
  "etymology_text": "From Latin folium. Compare fueille, from the plural of folium, folia.",
  "forms": [
    {
      "form": "foil oblique singular or",
      "tags": [
        "canonical",
        "masculine"
      ]
    },
    {
      "form": "fouz",
      "tags": [
        "oblique",
        "plural"
      ]
    },
    {
      "form": "foilz",
      "tags": [
        "oblique",
        "plural"
      ]
    },
    {
      "form": "fouz",
      "tags": [
        "nominative",
        "singular"
      ]
    },
    {
      "form": "foilz",
      "tags": [
        "nominative",
        "singular"
      ]
    },
    {
      "form": "foil",
      "tags": [
        "nominative",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "foil oblique singular, m (oblique plural fouz or foilz, nominative singular fouz or foilz, nominative plural foil)",
      "name": "fro-noun"
    }
  ],
  "lang": "Old French",
  "lang_code": "fro",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Old French entries with incorrect language header",
        "Old French lemmas",
        "Old French masculine nouns",
        "Old French nouns",
        "Old French terms derived from Latin",
        "Pages with 3 entries",
        "Pages with entries"
      ],
      "glosses": [
        "leaf (green appendage of a plant which photosynthesizes)"
      ],
      "links": [
        [
          "leaf",
          "leaf"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "feul"
    },
    {
      "word": "foel"
    },
    {
      "word": "fol"
    },
    {
      "word": "fueill"
    },
    {
      "word": "fuel"
    },
    {
      "word": "fuil"
    }
  ],
  "word": "foil"
}

{
  "called_from": "form_descriptions/1089",
  "msg": "suspicious unhandled suffix in Old French: 'foil oblique singular or', originally 'foil oblique singular or m'",
  "path": [
    "foil"
  ],
  "section": "Old French",
  "subsection": "noun",
  "title": "foil",
  "trace": ""
}

{
  "called_from": "form_descriptions/1089",
  "msg": "suspicious unhandled suffix in Old French: 'foil oblique singular or', originally 'foil oblique singular or m'",
  "path": [
    "foil"
  ],
  "section": "Old French",
  "subsection": "noun",
  "title": "foil",
  "trace": ""
}

{
  "called_from": "form_descriptions/1147",
  "msg": "suspicious related form tags ['masculine', 'canonical']: 'foil oblique singular or' in 'foil oblique singular, m (oblique plural fouz or foilz, nominative singular fouz or foilz, nominative plural foil)'",
  "path": [
    "foil"
  ],
  "section": "Old French",
  "subsection": "noun",
  "title": "foil",
  "trace": ""
}