"llíthu" meaning in Old Irish

{
  "head_templates": [
    {
      "args": {
        "1": "sga",
        "2": "noun form"
      },
      "expansion": "llíthu",
      "name": "head"
    }
  ],
  "lang": "Old Irish",
  "lang_code": "sga",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "líthu when unlenited"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Old Irish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Alternative spelling of líthu when unlenited"
      ],
      "id": "en-llíthu-sga-noun-I3LYhBQS",
      "links": [
        [
          "líthu",
          "líthu#Old Irish"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "llíthu"
}

{
  "head_templates": [
    {
      "args": {
        "1": "sga",
        "2": "noun form"
      },
      "expansion": "llíthu",
      "name": "head"
    }
  ],
  "lang": "Old Irish",
  "lang_code": "sga",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "líthu when unlenited"
        }
      ],
      "categories": [
        "Old Irish entries with incorrect language header",
        "Old Irish non-lemma forms",
        "Old Irish noun forms"
      ],
      "glosses": [
        "Alternative spelling of líthu when unlenited"
      ],
      "links": [
        [
          "líthu",
          "líthu#Old Irish"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "llíthu"
}