"leathern" meaning in Anglais

{
  "categories": [
    {
      "kind": "other",
      "name": "Adjectifs en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Lemmes en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Mots en anglais issus d’un mot en moyen anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Anglais",
      "orig": "anglais",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Du moyen anglais letheren, équivalent au moderne leather avec le suffixe -en."
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "adj",
  "pos_title": "Adjectif",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en anglais",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Exemples en anglais à traduire",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Termes vieillis en anglais",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              24,
              32
            ]
          ],
          "ref": "Mary W. Shelley, Frankenstein, page 100, édition de 1869",
          "text": "I found on the ground a leathern portmanteau"
        }
      ],
      "glosses": [
        "De cuir."
      ],
      "id": "fr-leathern-en-adj-icshPt3T",
      "tags": [
        "dated"
      ]
    }
  ],
  "synonyms": [
    {
      "sense": "nom commun",
      "word": "leather"
    }
  ],
  "word": "leathern"
}

{
  "categories": [
    "Adjectifs en anglais",
    "Lemmes en anglais",
    "Mots en anglais issus d’un mot en moyen anglais",
    "anglais"
  ],
  "etymology_texts": [
    "Du moyen anglais letheren, équivalent au moderne leather avec le suffixe -en."
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "adj",
  "pos_title": "Adjectif",
  "senses": [
    {
      "categories": [
        "Exemples en anglais",
        "Exemples en anglais à traduire",
        "Termes vieillis en anglais"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              24,
              32
            ]
          ],
          "ref": "Mary W. Shelley, Frankenstein, page 100, édition de 1869",
          "text": "I found on the ground a leathern portmanteau"
        }
      ],
      "glosses": [
        "De cuir."
      ],
      "tags": [
        "dated"
      ]
    }
  ],
  "synonyms": [
    {
      "sense": "nom commun",
      "word": "leather"
    }
  ],
  "word": "leathern"
}