"neilltu" meaning in Welsh

{
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "naill",
        "3": "tu",
        "t1": "one of two",
        "t2": "side"
      },
      "expansion": "naill (“one of two”) + tu (“side”)",
      "name": "com"
    }
  ],
  "etymology_text": "naill (“one of two”) + tu (“side”)",
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "-"
      },
      "expansion": "neilltu m (uncountable, not mutable)",
      "name": "cy-noun"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Welsh entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "neilltuo"
        }
      ],
      "glosses": [
        "one side (out of two or more)"
      ],
      "id": "en-neilltu-cy-noun-9DquQYOX",
      "tags": [
        "masculine",
        "not-mutable",
        "uncountable"
      ]
    }
  ],
  "word": "neilltu"
}

{
  "derived": [
    {
      "word": "neilltuo"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "naill",
        "3": "tu",
        "t1": "one of two",
        "t2": "side"
      },
      "expansion": "naill (“one of two”) + tu (“side”)",
      "name": "com"
    }
  ],
  "etymology_text": "naill (“one of two”) + tu (“side”)",
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "-"
      },
      "expansion": "neilltu m (uncountable, not mutable)",
      "name": "cy-noun"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Welsh compound terms",
        "Welsh entries with incorrect language header",
        "Welsh lemmas",
        "Welsh masculine nouns",
        "Welsh non-mutable terms",
        "Welsh nouns",
        "Welsh uncountable nouns"
      ],
      "glosses": [
        "one side (out of two or more)"
      ],
      "tags": [
        "masculine",
        "not-mutable",
        "uncountable"
      ]
    }
  ],
  "word": "neilltu"
}