"tríú" meaning in Irish

{
  "etymology_templates": [
    {
      "args": {
        "1": "ga",
        "2": "mga",
        "3": "*trímad"
      },
      "expansion": "Middle Irish *trímad",
      "name": "inh"
    },
    {
      "args": {
        "1": "sga",
        "2": "trí",
        "3": "",
        "4": "three"
      },
      "expansion": "trí (“three”)",
      "name": "m"
    },
    {
      "args": {
        "1": "ga",
        "2": "trí",
        "3": "-ú",
        "id2": "ordinal"
      },
      "expansion": "By surface analysis, trí + -ú",
      "name": "surf"
    }
  ],
  "etymology_text": "From Middle Irish *trímad, from trí (“three”). By surface analysis, trí + -ú.",
  "head_templates": [
    {
      "args": {
        "1": "ga",
        "2": "numeral",
        "cat2": "ordinal numbers"
      },
      "expansion": "tríú",
      "name": "head"
    }
  ],
  "lang": "Irish",
  "lang_code": "ga",
  "pos": "num",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Irish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "name": "Irish ordinal numbers",
          "parents": [
            "Ordinal numbers",
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Irish terms suffixed with -ú (ordinal)",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "ga",
          "name": "Three",
          "orig": "ga:Three",
          "parents": [
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "third"
      ],
      "id": "en-tríú-ga-num-semTJFBb",
      "links": [
        [
          "third",
          "third"
        ]
      ],
      "synonyms": [
        {
          "tags": [
            "obsolete"
          ],
          "word": "tríomhadh"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/tʲɾʲiːuː/"
    }
  ],
  "word": "tríú"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "ga",
        "2": "mga",
        "3": "*trímad"
      },
      "expansion": "Middle Irish *trímad",
      "name": "inh"
    },
    {
      "args": {
        "1": "sga",
        "2": "trí",
        "3": "",
        "4": "three"
      },
      "expansion": "trí (“three”)",
      "name": "m"
    },
    {
      "args": {
        "1": "ga",
        "2": "trí",
        "3": "-ú",
        "id2": "ordinal"
      },
      "expansion": "By surface analysis, trí + -ú",
      "name": "surf"
    }
  ],
  "etymology_text": "From Middle Irish *trímad, from trí (“three”). By surface analysis, trí + -ú.",
  "head_templates": [
    {
      "args": {
        "1": "ga",
        "2": "numeral",
        "cat2": "ordinal numbers"
      },
      "expansion": "tríú",
      "name": "head"
    }
  ],
  "lang": "Irish",
  "lang_code": "ga",
  "pos": "num",
  "senses": [
    {
      "categories": [
        "Irish entries with incorrect language header",
        "Irish lemmas",
        "Irish numerals",
        "Irish ordinal numbers",
        "Irish terms derived from Middle Irish",
        "Irish terms inherited from Middle Irish",
        "Irish terms suffixed with -ú (ordinal)",
        "Irish terms with IPA pronunciation",
        "ga:Three"
      ],
      "glosses": [
        "third"
      ],
      "links": [
        [
          "third",
          "third"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/tʲɾʲiːuː/"
    }
  ],
  "synonyms": [
    {
      "tags": [
        "obsolete"
      ],
      "word": "tríomhadh"
    }
  ],
  "word": "tríú"
}