"deu" meaning in Old Irish

{
  "forms": [
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "deu",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    },
    {
      "form": "ndeu",
      "source": "mutation"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "sga",
        "2": "noun form"
      },
      "expansion": "deu",
      "name": "head"
    }
  ],
  "lang": "Old Irish",
  "lang_code": "sga",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "déu"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Old Irish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 17 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Alternative spelling of déu"
      ],
      "id": "en-deu-sga-noun-MRQePTdJ",
      "links": [
        [
          "déu",
          "déu#Old_Irish"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "deu"
}

{
  "forms": [
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "deu",
      "source": "mutation",
      "tags": [
        "error-unrecognized-form"
      ]
    },
    {
      "form": "ndeu",
      "source": "mutation"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "sga",
        "2": "noun form"
      },
      "expansion": "deu",
      "name": "head"
    }
  ],
  "lang": "Old Irish",
  "lang_code": "sga",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "déu"
        }
      ],
      "categories": [
        "Old Irish entries with incorrect language header",
        "Old Irish non-lemma forms",
        "Old Irish noun forms",
        "Pages with 17 entries",
        "Pages with entries"
      ],
      "glosses": [
        "Alternative spelling of déu"
      ],
      "links": [
        [
          "déu",
          "déu#Old_Irish"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "deu"
}

{
  "called_from": "inflection/2457",
  "msg": "rejected heuristic header: table cell identified as header and given candidate status, BUT the cleaned text is not in LANGUAGES_WITH_CELLS_AS_HEADERS[Old Irish]; cleaned text: deu",
  "path": [
    "deu"
  ],
  "section": "Old Irish",
  "subsection": "noun",
  "title": "deu",
  "trace": ""
}

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

{
  "called_from": "inflection/735",
  "msg": "inflection table: unrecognized header: 'lenition'",
  "path": [
    "deu"
  ],
  "section": "Old Irish",
  "subsection": "noun",
  "title": "deu",
  "trace": ""
}

{
  "called_from": "inflection/735",
  "msg": "inflection table: unrecognized header: 'nasalization'",
  "path": [
    "deu"
  ],
  "section": "Old Irish",
  "subsection": "noun",
  "title": "deu",
  "trace": ""
}

{
  "called_from": "inflection/1826",
  "msg": "inflection table: empty tags for ndeu",
  "path": [
    "deu"
  ],
  "section": "Old Irish",
  "subsection": "noun",
  "title": "deu",
  "trace": ""
}