"llau pen" meaning in Welsh

{
  "forms": [
    {
      "form": "lleuen pen",
      "tags": [
        "singulative"
      ]
    },
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "cy-mut",
      "source": "mutation",
      "tags": [
        "inflection-template"
      ]
    },
    {
      "form": "llau pen",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    },
    {
      "form": "lau pen",
      "source": "mutation",
      "tags": [
        "soft"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f-p",
        "2": "lleuen pen"
      },
      "expansion": "llau pen f (collective, singulative lleuen pen)",
      "name": "cy-noun"
    }
  ],
  "inflection_templates": [
    {
      "args": {},
      "name": "cy-mut"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Welsh entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "cy",
          "name": "Lice",
          "orig": "cy:Lice",
          "parents": [
            "Insects",
            "Arthropods",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "cy",
          "name": "Parasites",
          "orig": "cy:Parasites",
          "parents": [
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "head lice"
      ],
      "id": "en-llau_pen-cy-noun-NVlDi18Q",
      "links": [
        [
          "head lice",
          "head louse"
        ]
      ],
      "related": [
        {
          "english": "nits",
          "word": "nedd"
        }
      ],
      "tags": [
        "collective",
        "feminine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌɬaɨ̯ ˈpɛn/",
      "tags": [
        "North-Wales"
      ]
    },
    {
      "ipa": "/ˌɬai̯ ˈpɛn/",
      "tags": [
        "South-Wales"
      ]
    },
    {
      "rhymes": "-ɛn"
    }
  ],
  "word": "llau pen"
}

{
  "forms": [
    {
      "form": "lleuen pen",
      "tags": [
        "singulative"
      ]
    },
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "cy-mut",
      "source": "mutation",
      "tags": [
        "inflection-template"
      ]
    },
    {
      "form": "llau pen",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    },
    {
      "form": "lau pen",
      "source": "mutation",
      "tags": [
        "soft"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f-p",
        "2": "lleuen pen"
      },
      "expansion": "llau pen f (collective, singulative lleuen pen)",
      "name": "cy-noun"
    }
  ],
  "inflection_templates": [
    {
      "args": {},
      "name": "cy-mut"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "related": [
    {
      "english": "nits",
      "word": "nedd"
    }
  ],
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Rhymes:Welsh/ɛn",
        "Rhymes:Welsh/ɛn/2 syllables",
        "Welsh collective nouns",
        "Welsh entries with incorrect language header",
        "Welsh feminine nouns",
        "Welsh lemmas",
        "Welsh multiword terms",
        "Welsh nouns",
        "cy:Lice",
        "cy:Parasites"
      ],
      "glosses": [
        "head lice"
      ],
      "links": [
        [
          "head lice",
          "head louse"
        ]
      ],
      "tags": [
        "collective",
        "feminine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌɬaɨ̯ ˈpɛn/",
      "tags": [
        "North-Wales"
      ]
    },
    {
      "ipa": "/ˌɬai̯ ˈpɛn/",
      "tags": [
        "South-Wales"
      ]
    },
    {
      "rhymes": "-ɛn"
    }
  ],
  "word": "llau pen"
}

{
  "called_from": "parser/1336",
  "msg": "no corresponding start tag found for </small>",
  "path": [
    "llau pen"
  ],
  "section": "Welsh",
  "subsection": "noun",
  "title": "llau pen",
  "trace": ""
}

{
  "called_from": "inflection/865",
  "msg": "inflection table: IF WITHOUT ELSE EVALS False: llau pen/Welsh 'radical' base_tags=set()",
  "path": [
    "llau pen"
  ],
  "section": "Welsh",
  "subsection": "noun",
  "title": "llau pen",
  "trace": ""
}

{
  "called_from": "inflection/865",
  "msg": "inflection table: IF WITHOUT ELSE EVALS False: llau pen/Welsh 'nasal' base_tags={'error-unrecognized-form', 'soft'}",
  "path": [
    "llau pen"
  ],
  "section": "Welsh",
  "subsection": "noun",
  "title": "llau pen",
  "trace": ""
}

{
  "called_from": "inflection/865",
  "msg": "inflection table: IF WITHOUT ELSE EVALS False: llau pen/Welsh 'aspirate' base_tags={'error-unrecognized-form', 'soft'}",
  "path": [
    "llau pen"
  ],
  "section": "Welsh",
  "subsection": "noun",
  "title": "llau pen",
  "trace": ""
}