"llain" meaning in Gallois

{
  "categories": [
    {
      "kind": "other",
      "name": "Noms communs en gallois",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Gallois",
      "orig": "gallois",
      "parents": [],
      "source": "w"
    }
  ],
  "derived": [
    {
      "word": "cyhydedd-lain"
    }
  ],
  "etymology_texts": [
    "Du celtique *lagina, apparenté au grec λαχαίνω, lákhainô (« creuser la terre »), au portugais laja (« lauze, large pierre plate »)."
  ],
  "forms": [
    {
      "form": "lleiniau",
      "tags": [
        "plural",
        "unmutated"
      ]
    },
    {
      "form": "lain",
      "raw_tags": [
        "Lénition"
      ],
      "tags": [
        "singular"
      ]
    },
    {
      "form": "leiniau",
      "raw_tags": [
        "Lénition"
      ],
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Gallois",
  "lang_code": "cy",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "glosses": [
        "Lame."
      ],
      "id": "fr-llain-cy-noun-AHRqReGI"
    },
    {
      "examples": [
        {
          "text": "Llain Gaza.",
          "translation": "Bande de Gaza."
        }
      ],
      "glosses": [
        "Bande."
      ],
      "id": "fr-llain-cy-noun--gvDbfB5"
    }
  ],
  "tags": [
    "feminine"
  ],
  "word": "llain"
}

{
  "categories": [
    "Noms communs en gallois",
    "gallois"
  ],
  "derived": [
    {
      "word": "cyhydedd-lain"
    }
  ],
  "etymology_texts": [
    "Du celtique *lagina, apparenté au grec λαχαίνω, lákhainô (« creuser la terre »), au portugais laja (« lauze, large pierre plate »)."
  ],
  "forms": [
    {
      "form": "lleiniau",
      "tags": [
        "plural",
        "unmutated"
      ]
    },
    {
      "form": "lain",
      "raw_tags": [
        "Lénition"
      ],
      "tags": [
        "singular"
      ]
    },
    {
      "form": "leiniau",
      "raw_tags": [
        "Lénition"
      ],
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Gallois",
  "lang_code": "cy",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "glosses": [
        "Lame."
      ]
    },
    {
      "examples": [
        {
          "text": "Llain Gaza.",
          "translation": "Bande de Gaza."
        }
      ],
      "glosses": [
        "Bande."
      ]
    }
  ],
  "tags": [
    "feminine"
  ],
  "word": "llain"
}